This is the case that bounty hunters often encounter when doing bounty for ICO project from the mid last year to now and I think this is the way which projects want to reduce amount of distribution token for bounty hunters and it is also considered a scam
obviously it was a fraud for campaign participants. we already know all the rules can indeed change at any time according to the wishes and decisions of the development team. but if it feels that it is not in accordance with the reasonableness, surely the campaign participants will protest.