The practice of bounty managers hiding their spreadsheet from participants is becoming rampant. They hide their spreadsheet and pay bounty hunters penny, which I think is a lack of integrity and it is totally uncalled for.
I have participated in like 3 bounties in the past where managers refuse to make the spreadsheet available to hunters. They all paid ridiculous amount. I got tokens worth $18 for 3 contents that I created. I believe this is exploitation and it have to stop.
I think you are right, that is exploitation. Sometimes I think they underestimate all the bounty hunters. They think if you do bounty, you are a "third countries" people's who are cheap labour and could live with a dollar a day. Not only exploitation, I see a lot of insulting to the bounty hunters.