There's no incentive for the ad platforms to account for that, real-time bidding will make money for them no matter the experience of the ad being showed.

If you get another ad for a product you already bought the advertiser already paid for placement, a click through is just a bonus on top of that. Even more when information is so secretly guarded that any analysis of the impact of an ad is extremely flawed, it hasn't solved the old adage from John Wanamaker:

> Half the money I spend on advertising is wasted; the trouble is I don't know which half

It's meant to be that way, the ad platforms do not want advertisers to know what is waste and optimise their ads further than what's needed to keep them advertising, they just need to throw some bones here and there, convert a few people through clicks, to make themselves look indispensable.

There's no incentive to improve that, at all.