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 percentage was surely lower i think about 80% of the ICO's are already a scamming scheme in the cryptocurrency community,
In the past years it already become a big scam since the ICO's developer are just wanting investors to invest in their token and the project is just going to end up nothing, the token is not going to be maintained and worst not even listed in a market exchanger since the developer don't have a planned in the ICO's it was hard to resist in my opinion since they have a lot of investors it was easy to scam the money especially if you have a huge amount of it, as we all know ICO's get a lot of bitcoin in one project.