Earlier quoted context omitted.
I used to think this every time I downloaded a free mobile game. Probably 90%+ of ads in mobile games were for other free mobile games that presumably also have the same ad-supported model and the same sort of advertisers. It feels like there's a few games making heaps from IAPs and everyone else is just advertising in a pyramid toward them while also using IAPs in a way that makes their own game basically unplayable…
Similarly, web comic ads seem to consist entirely of ads for other web comics.
What is boneheaded is advertising shovels to me because I was tracked while buying another shovel online. I already have my damn shovel for the next 50 years I do not care anymore at all about shovels. Now if I were served a wheelbarrow ad...