In-game ads are a cancer, breaking the immersion and the game flow.
That's part of why I don't wanna work on mobile gaming anymore, monetization is parasital to the experience or simply abusive thanks to the worst cognitive manipulations. https://www.deceptive.design/types
The other reason I don't want to work on mobile is the dependance (read no choice) to apple and google, see what happens to Fortnite.
On PC, you can distribute yourself and still be extremely successful (kudos to Vintage Story team).
Players prooved countless times that they will buy and even fund experiences they enjoy or are promised to enjoy (which can lead to another set of problems but it's not the topic). So I prefer to rely on gamers buying my game.