What did you have mind?

I figure a ban of targeted advertisement would look like “The ads are only allowed to change once a day, and everybody during said day sees the same ads”. Whereas currently, each time you load a website, there’s an impromptu auction to sell the ad spots. (Advertisers don’t actually have to pay until you click their ad). So there would be less incentive to keep the user constantly engaged, as it would be enough if the user just visits regularly.

If you do the 1st one, then most companies likely wouldn’t bother with such algorithms anymore.