I agree with you because even though they have the right to change bounty rules anytime, they should state the important rules at the beginning and not doing that when it is time to pay reward because people have worked and just to find excuses not to pay all, they give new rules which is very disappointing. I support that all necessary rules be started as soon as they begin the campaign.
I was feel bad because I saw lot of complain one of the BM group chat management. They don't even care about the participant because they all have the rights they want. Hunters give effort in every bounty, they work hard for it and they deserve their payment but because of that rights it's gone.