It's like using people to spread info about yourself and disappointing them at the end. Yeah, only 20% of the transactions might've went through, but to use it as an excuse is unacceptable. It's not the fault of people that you were scammed so much. If you're holding things as "bounties", there need be put necessary measures to tackle such situations. If this is the way your main project is gonna run as well, I'll not be surprised if it takes a massive dump.