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2) Find a host that is willing to trade space and bandwidth in exchange for a large share of future ad revenue.
3) Build yourself a searchengine that doesn't suck.
4) Enjoy it for about 30 minutes after it goes live.
5) Start reading your thousands of emails from "webmasters" that were wrongfully ranked poorly despite having used every trick in the book.
6) ...and this one is only if you are smart...Ignore all emails from #5.
Freq---
No, seriously: Publishing is almost as good as patenting in some respects, plus you will get feedback for further development if you publish with a feedback channel (email/blog/forum/whatever).
What else to do? I mean, start a SE? Come on, the web's littered with those already.
If you want it to grow, give it away: Make it true Open Source and forget about rights and all that. A million fingers code faster than ten, and it's most likely the only way you can compete in a market as crowded as that.
Publishing is almost as good as patenting...
Publishing means that I can't patent it. Also, the main problem for further development are my limitation of time (at least as long as I'm not paid for it) and the technical restrictions (You need a large data set of crawled websites as well as numerous computational power to test and improve these algorithms, especially the ranking algorithm).
I mean, start a SE?
Indeed, start a SE is not an option.
give it away
I won't do that. I either want to have the control over the development or get money for it.