Different solution:
- Make a search engine that is actually good. Blacklist all SEO spam such as pinterest, allow complex queries, restrict by date, site, regex, etc
- Charge 1 cent per search, or as much as is necessary
Why has nobody done this? What am I missing?
I would totally use this. And if the pricing were correct, you wouldn't need a captcha and could just expose it as an api for bots