Most native advertising is bought on a cost-per-click basis rather than by impression. The pricing model follows from what each side of the transaction can credibly promise.
The placement is below the point of interest
Recommendation units sit at the end of an article, after the content the reader came for. A large share of readers never reach them.
Selling those impressions by the thousand would require the advertiser to pay for delivery that may never be seen.
Pricing on the click removes that risk, because payment is triggered by an action that proves the unit was reached and read.
The auction shifts the risk to the publisher
Under this model the publisher earns nothing from an impression that fails to produce a click. Yield depends entirely on click rate.
Advertisers therefore compete on how much they will pay per click, and the platform ranks them by expected revenue per impression.
Expected revenue combines the bid with the predicted click rate, which means a compelling headline with a modest bid can outrank a dull one bidding higher.
What this does to creative
The economics reward whatever produces clicks, and curiosity produces clicks more reliably than clarity does.
A headline that withholds the answer outperforms one that states it, because stating it satisfies the reader without a visit.
That pressure is structural rather than a matter of taste, and it explains the recognisable tone of the format better than any account of individual advertisers.
Why the advertiser still carries risk
Paying per click guarantees a visit and nothing beyond it. A curiosity-driven click frequently ends in an immediate exit.
The advertiser has then paid full price for a visitor who never engaged, which is the failure mode the pricing model does not protect against.
This is why native performance has to be judged on post-click behaviour rather than on click cost, which looks efficient in almost every account.
Where impression pricing survives
Sponsored articles and branded content are usually sold differently, on a flat fee or by impression, because the objective is exposure rather than traffic.
Those placements sit within the editorial flow, so delivery is far more certain and the publisher can price it with confidence.
The two formats are often described with the same word, and they operate on opposite economics, which is why performance expectations transfer badly between them.