I would suggest IEO if the team members are still serious with the abandoned projects. But the issue is that, most of the abandoned projects were not like that because of financial issue alone, most of them do not really have tangible things to offer initially. They want to gather some dollars from the investors and run away. That's why they don't bother seeking for alternative ways of funding such projects when it crashed. I believe those few genuine ones with true financial problem can come back and still get some support.
scammers dont have the face to comeback again and why will they do that when people are going to accuse them but they say theres always a second chance , what if they will comeback for a change ? how will we know that if we will not try . if they gather huge funds , they can then pay the previous investors that they have been scammed . for those that arent scammers , they arent scammers they are always welcome to comeback and people are going to accept and forgive them warmly .