Comment by galaxyLogic

I think the solution to captcha-rot is micro-payments. It does consume resources to serve a web-page so whose gonna pay for that?

If you want to do advertisement then don't require a payment, and be happy that crawlers will spread your ad to the users of AI-bots.

If you are a non-profit-site then it's great to get a micro-payment to help you maintain and run the site.