A lot of projects are becoming scams and making reasons just to do exit scam.
Try to avoid this kind of suspicious project and you're wasting your time and effort. Analyzing the project before investing or doing bounties could help you take time to know if its legit or not.
The reasons for those scam projects were due to fraud promotions which every people who handled the management of funds in a wrong way. After being launch in the market it hasn't gain a good price after being listed on the exchanges. Every efforts give out to the projects were worthless and I think this brought a bad effect for all ICO if this will continue to scam people all the time.