I don’t support ads but I also don’t support Google serving a version of the page that steals money from content creators. So, therein lies the problem: choice.
I can imagine a future where amp is ubiquitous and Google begins serving ads on amp content. Luckily, companies have to make money and amp is not in most people’s or company’s best interests.
If amp was opt-in only, this would be much more ethically sound.