People based recommendations sites, get a lot of spam when they grow. Eg. A company spamming on the competitor products, and things like this. It's a too much p

People based recommendations sites, get a lot of spam when they grow. Eg. A company spamming on the competitor products, and things like this. It's a too much populated space. In my opinion, focus on a niche, like recommendations for engineers, or make it as a complementary to Octopart (YCW07, search engine for electronic parts). And if you do great, then you may apply to YC.