Genuine question: any ads from any network? Not just googles? Because if so, I fully expect someone to mess up and have that detection mark sites with zero ads

Genuine question: any ads from any network? Not just googles? Because if so, I fully expect someone to mess up and have that detection mark sites with zero ads as having them, thus tracking their users. Detection is never 100%. Never ever. Unless I’m misunderstanding, which is likely (and I hope I am)