At this time there are bounty campaign regulations that have been added, such as sending authenticator messages on the bounty campaign forum that we will be working on, this is intended so that no double accounts are used in one bounty campaign. Now there are many bounty campaigns that provide a small amount of funds for bounty participants so that many bounty hunters are discouraged from participating in the bounty campaign.
Those authenticating messages aren't really a thing. It's just a way to know if you really applied for them and that's what you need to add with those forms. I don't think that small amount of funds is to discourage bounty participants but it's the actual budget of the bounty and they can no longer stretch that budget if that's what they have allocated for. Nevertheless, there are bounties that have huge projection and funding for their bounty but it's going to be paid in their tokens which means that there's still not that much of a value until it goes live on exchanges and becomes tradable. While waiting for that progress, they have a budget out of thin air.