the best ico rating site i think icobench. But i think using rating site is not very effective to use.
You must combine using it and your research as well. When you want to put your funds to a project, you must find about that project value carefully
so you won't waste your money later.
Sounds logic, but I would also put it this way: Most of guys entering here on cryptocurrencies market are wanting to have their profits fast and easy, so they would rather look for somebody else opinion, expressed in rating numbers, and invest in the project that somebody else consider as worthy. And then, which is the most funniest, they would blame others for their own failures. Hilarious!