Ways to earn from search engines

Question

I see people creating search engines a lot but how many ways are there to actually earn from one? Any ideas?

    Remember you can't puts adsense everywhere because that won't get your search engine anywhere.

Answer 1

So you can only earn by selling it? But then why would someone else buy it? Just to sell it again?

Answer 2

In this time, I don't think, thinking about creating a new search engine will be a beneficial step. Google is the king here, but yeah! if someone is that much courageous, then it's a big effort top popularize it.