Don't you know about lotteries? Then you probably must have missed all the most hyped recent ICOs that required you to take part in some lottery or pass a test that can prove that you have read and completely understood their whitepaper. So it wasn't you who picked the ICO to participate, instead of it the team was examining all the potential investors.

For example, check QuarkChain. Only their lottery winners have been accepted to be whitelisted for their tokensale.