Usually those types of display ads show up when targeting isn't possible, or your anonymized such that the CPMs for your session are low enough that it's cheap

Usually those types of display ads show up when targeting isn't possible, or your anonymized such that the CPMs for your session are low enough that it's cheap enough for these types of ads to make money. There are really only 3 buyers of banner/display ads when no targeting is available: 1) Huge multinationals - think geico, coke, etc. Broad awareness campaigns 2) Scams, body horror, YMYL, click-trick, etc. This is what you're seeing. Info products, garbage cosmetics and scam courses have such huge margins that they can spend on broad-targeted placements for very cheap CPMs, with aggressive creatives that are A/B tested to death to get people to click. As long as the CPM is cheap, and the CTRs are high enough, the numbers work. 3) "Inexperienced" ad buyers I'm not commenting or interested in debating the ethics of tracking and the internet data economy, but a side effect of removing 3rd party targeting is that as attribution goes away, buyers of ads pay less since they can't attribute dollars to campaigns, so you have to move to attribution methods more common in radio and TV. And as costs fall, it gives opportunities to the slimey shit you've been seeing.