That's not a big issue, all you need to do is to keep checking the spreadsheet regularly and when you site any form of scamming report to the bounty manager immediately, I'm sure they will work on it
Maybe for someone it isn't a problem. But personally I appreciate the time and I consider that I shouldn't do work of the manager. Nobody will pay me for it. If I see that the manager badly performs the work, just I try not to participate in his companies.