I personally do not believe this statistics that 99% of ICOs are scam, because some ICOs fail do not mean they are all scam. I usually tell people that starting an ICO is like starting a new business, it might succeed immediately, it might fail presently but have a great future and it might fail totally beyond redemption. So because a project is failing to perform presently or fail totally do not mean it is a scam. Don't get me wrong here, I never said there are no scam projects but the rate is not as high as alleged. Judging a project based on its first few years is wrong, give it time to realize its potentials.
The problem is that many of these failures are due to the fact that such ICOs are unable to comply with the plans established in their roadmaps, despite having the necessary financing and a team of developers supposedly aware of the problems they address. And in that case, when a company is unable to fulfill the promises they used to convince investors, I think it is valid to talk about a real scam.