I posted on this thread a while ago and mentioned that 90% of ICOs seem like a scam, then others even indicate that the 99% of projects are scam.
Here are some facts. Based on a real research that analysed the 1000+ discontinued projects their conclusion was this: While the vast majority of projects do never get completed, only 20% of projects are actually fraudulent. This number is of course still to high. But it is noteworthy that most projects at least start with the intention to create something.