It's not only the big-boobed characters promoting mobile games, there are (video) ads for pyramid and other "get rich quick" schemes, conspiracy theories (government will force everyone to become transgender!) and whatnot.
They don't give just the tiniest bit of a shit for all of this, as long as they are earning money with it.
Oh my dog. Before I set up Invidious to ensure my experience on iPad and such could be ad free, the one that really shocked me is one of the two ads that would show up mid-roll for a creator I watched regularly was SIXTY SIX MINUTES in length. Yes, an hour and six minutes! I can’t imagine what that must cost, but clearly whatever they were selling must cover the costs of a 66-minute ad well enough!
Plenty of shops, waiting rooms, lounges, bars, etc have a TV which is simply tuned to a youtube playlist. Whoever is issuing those ads is counting on that the operators of those TV's for whatever reason (either because they don't care, don't notice, or don't have access to the controls) don't skip them.
For example, someone who watches the Forgotten Weapons channel on Youtube might get recommended far-right conspiracy videos, because people who like guns often like far-right politics. They might also get recommended Scott Manley and Greg's Airplanes and Automobiles because all three have deep dives into interesting historical technology.
Ideally, there would be more manual knobs for communicating one's preferences about such things to recommendation algorithms.
Being able to at least switch between some presets for the algorithm would be amazing.