I think there are a lot of projects which are real, good and has huge potential but due to very low interest by investors the project did not get the soft cap or hard cap and then the project extends its IEo or ICO and after due time again it  not get the keen interest by investors and at last the project become scam. And the most affected by these projects are bounty hunters as they always do there best to promote the project but when they did not get any rewards then this was the most hurting situation.