Well, this just shows that the campaign is actually paying, but the requirements for participants to get paid is somewhat not clear.
- No spreadsheet to start with
- Users are being removed without proper explanation whatsoever.
- Their signature code isn't that attractive as well. I will suggest paying a signature designer for their signatures if they want to get noticed.

I hope that the OP/Manager will share some things on what's happening right now. There are some red flags indeed, but it can easily get solved IMO. They paid their participants in the first week of the campaign like @yazher said (although the transaction ID isn't posted here like what campaign managers usually does), so I guess they are willing to pay (at least for now). Let's give them some time to explain.