Editorial control of ads has nothing to do with the technical serving mechanism. Self-hosting ads doesn't mean the site pays more attention to the choice of ad

Editorial control of ads has nothing to do with the technical serving mechanism. Self-hosting ads doesn't mean the site pays more attention to the choice of ads, any more than using a third party ad-system means that a site doesn't pay attention to the choice of ads. If sites self-served ads, people would develop ad blockers that blocked them. Just because third-party ad server filtering is the standard way ad-blocking works now, we shouldn't make the mistake of thinking the third-party ad servers are the reason people block ads. And of course once you break down the barrier between content and ads you have a much more serious risk of conflict of interest. Major TV stations, magazines and newspapers will often avoid news articles that are disparaging of their major advertisers, something that doesn't occur when there's a complete separation of ad sales and content provision.