Ad Pricing Model

When buying advertising meant buying a slot, the price was fixed in advance. A full page in a newspaper cost a set amount, thirty seconds in the evening block cost another, and the bill was the same whether many people saw the ad or almost nobody did. The only things for sale were space and time, so nobody had to ask what unit the price attached to.

Online advertising changed that premise. How many times an ad appeared, who clicked it, whether the clicker went on to sign up — all of it started landing in one connected record, and suddenly there were several countable things instead of one. That created a question nobody had needed to answer before: which of those counts does the money attach to? Charging per appearance, per click, or per signup turns the same campaign into completely different invoices. A month of running one campaign might leave 3 million impressions, 24,000 clicks, and 620 signups behind it. At $4.50 per thousand impressions that bill is $13,500. At $0.60 a click it is $14,400. Same ad, same results, and the amount is decided by which column gets counted.

Where this choice shows up as a money problem is usually the reconciliation meeting. The platform says it served the ad three million times; the advertiser asks how many people signed up. Both statements are true and both are counting something different. A platform can manufacture impressions, but signups are produced by the page people land on after the click, so the moment the counted unit is chosen, so is the answer to who eats the loss when the campaign underperforms.

That is why the pricing model gets settled before the ads are built, usually before anyone signs a contract. However carefully a team picks the ad format and the audience, a different billing unit puts a different number on identical results. It also sits at the end of the troubleshooting order. Only when signups are arriving and the money still doesn't work out does anyone go back and look at what is being counted.

Pricing units divide along a single axis: which step in the path a person takes after meeting the ad gets counted. The steps run in order — the ad appears, a video plays, someone clicks, someone leaves a phone number or installs an app, someone pays. The further down that line the billing point sits, the safer the advertiser is and the more exposed the platform is. Buy near the top and money leaves even when nothing happens; buy near the bottom and the platform has been running ads for free during every stretch with no result. That is why the lower units are rarely offered, and why they cost so much when they are.

1. Cost per mille (CPM) — priced in blocks of a thousand impressions, where an impression is one appearance of the ad on a screen. The thousand-unit block exists because a single impression costs a fraction of a cent and is awkward to quote. When Pagedeck puts $450 into a placement at a $4.50 CPM, it buys 100,000 impressions. If nobody clicks during those 100,000, the $450 goes out anyway. Teams use it when reaching a set number of people in a set window is the point in itself, or when the platform opens nothing else.
2. Cost per view (CPV) — paid per video view, where a view means the video ran past some threshold. The threshold varies by platform: three seconds at one, thirty seconds or a full play at another. Bought on a three-second definition a view runs about $0.02, and it counts people who scrolled straight past. Bought on thirty seconds it climbs to $0.08 and counts only people who stayed. Skip the definition of a view during negotiation and two contracts with the same name can differ fourfold.
3. Cost per click (CPC) — paid per click on the ad, and the unit most teams actually run on. Impressions that go nowhere cost nothing, while whatever the clicker does next is the advertiser's problem, so the risk splits roughly in half. At $0.60 a click, bringing 1,000 people to Pagedeck costs $600, and if 30 of them sign up, each signup cost $20.
4. Cost per lead (CPL) — paid per lead, meaning per person who left something that allows a follow-up, such as a name and a phone number. Submitting a demo request or typing a work email to download a document both count. It suits products where sales has to make a call before any purchase happens. Fifty leads at $15 each comes to $750, and if only half of them answer the phone, an actual conversation cost $30.
5. Cost per install (CPI) — paid per app install, which makes it a unit for ads pointing at an app store and irrelevant to a web product. Installs are hard to dispute because the record is clean, but installing and using are different events. Two thousand installs at $1.10 comes to $2,200, and if 600 of those people got past the first screen, the real unit price is about $3.70.
6. Cost per action (CPA) — paid per occurrence of an action agreed on in advance, such as a signup or a purchase. No result means no charge, which makes it the safest unit for the advertiser and therefore the most expensive one. Opening it requires sending conversion records from the advertiser's side back to the platform, and if the monthly volume of conversions is small, the platform has nothing to work with and simply won't offer it.

The further down the line a unit sits, the more the definition of a single countable event has to be written down. A conversion at Pagedeck could be a free signup or a paid subscription. Count free signups and the unit price looks cheap while including people who will never pay a cent. Count paid subscriptions and the number is honest, but since many people pay about two weeks after signing up, this month's advertising lands on next month's invoice. Without the definition of a conversion and the window it has to occur in written into the contract, reconciliation ends with the platform and the advertiser holding different counts for the same campaign.

None of this is a single choice made once. Different campaigns in the same quarter run on different units — impressions for a campaign introducing the product's name, clicks for a campaign collecting signups, leads for an enterprise campaign that hands off to sales. The available range is set by the platform too. If a placement only opens CPM, wanting something else changes nothing.

Different units still get compared in one place. Whatever the billing unit was, everything converts at the end into what one signup or one purchase cost. A campaign bought on impressions that spent $450 and produced 12 signups comes to $37.50 each; a campaign bought on clicks that spent $600 and produced 30 comes to $20 each. Line them up that way and a common yardstick applies despite different invoices. What the pricing model decides is when money leaves, not what that money produced.

"This placement only opens CPM. On impressions we pay in full even if nobody clicks."

The platform sells by impression only, so a bad result lands entirely on the advertiser. It's a flag to reconsider entering at all.

"We're on CPC at $1.05 a click — what does that come to per signup?"

The billing unit alone says nothing about whether this is going well, so convert it into cost per signup before judging.

"They'll open CPA at $30 an action. Cheaper to just run it ourselves."

Handing the risk to the platform costs $30 a signup when running it in-house costs $20, and that gap isn't worth paying.

At Pagedeck this decision belongs to Ravi, the growth marketer. In the quarter when spend climbed toward $15,000 a month, he bought both search and feed placements on clicks. The feed platform pushed for impressions and he declined for a simple reason: most people seeing a Pagedeck ad weren't looking for a meeting-notes tool, so buying impressions meant paying for everyone who didn't care. He kept the unit unchanged even after narrowing the audience pushed the cost per click from $0.60 to $1.05, because cost per signup fell from $20 to $8.50 over the same change.

Midway through the quarter one platform offered to sell on conversions at $30 a signup. Grace, the chief executive, liked that nothing would be owed without a result, until Ravi laid out the arithmetic and the conversation ended. In-house the number was already $8.50, so handing it over meant paying more than three times as much. Sofia in sales added the point that settled it: bought on conversions, the platform optimizes toward whoever signs up most easily, and signups that sit on the free plan and never answer a call only inflate a count. Ravi took the budget he would have spent there and raised weekly click spend at the same platform to $1,500, and cost per signup held near $9 for the rest of the quarter.

The most common mistake is assuming CPA always wins because you only pay for results. A clause saying no signup means no charge looks safe from any angle, which makes the reading natural. But the platform understands that risk too, and prices it in ahead of time to cover every stretch where it runs ads and collects nothing. That is exactly why a signup that costs $8.50 when bought on clicks arrives as a $30 quote on a conversion deal. The unit also isn't available for the asking: platforms open it only to advertisers with enough conversion history for their systems to work from. Left uncorrected, this assumption burns weeks negotiating for terms that were never going to open, and when one does open, the campaign runs at a unit price above the payback line for as long as it stays on.

Believing that switching the pricing model makes advertising cheaper is the other frequent error. Numbers look different when the billing unit changes, so the illusion is an easy one. Underneath, the same auction runs for the same placement. Platforms price each unit so that expected revenue from a given slot comes out about the same either way, and switching to clicks simply means an ad with a weak click rate gets fewer impressions. A placement that cost $450 for 100,000 impressions ends up costing roughly the same on a click basis as long as the rate of clicking holds. Hold onto this belief and weeks go by swapping units and wondering why nothing moved, while the things that would have moved it — the creative, the audience, and the page people land on — never get opened.