1. Rating- If the ICO has some rating. If this rating is good or high it is a indication that this is a good ICO.
2. Managers of the bounty- some managers has good reputation such as Amazix , Kripital etc.
3. The team behind the team -IF the team is strong and capable with good track record it is a indication that the bounty and ICO will succeed.
These are the main points come into my mind.
By looking at the rating of ICOs in my opinion is the right choice in appeal to see the website or whitepaper. Because with the rating we would immediately know that the vision and mission of ICOs is good or not depending on the rating.