Well, there are many ICO projects that  do not get  enough funds or soft caps, so the  team is very  difficult to pay the campaign participants.
That’s the reason because  so many  projects also commit scams so  that projects that are really serious and good, don’t get a steady stream
of funds from investors. But there are also projects that get funding and great success on their ICO, but they still don’t want to pay campaign
participants, that’s really sneaky.