It's hard to participate in some IDO while some are just scam, I don't bother joining any again all I do now is buy the tokens after listed on exchange and thus have good performance value wise
Buying tokens after being listed on the exchange also has its risks even though it is slightly different from the risk of following the IDO from the start, because there are also good and worthy IDOs to be followed even though there are some who are scams because it cannot be avoided by anyone now.