Before you start complaining that bounty managers change bounty rules after bounty ended or KYC was later implemented do you read the bounty rules and regulations?
Many bounties have already says it all in their rules and regulations that 'THE BOUNTY MANAGER HAS THE RIGHT TO CHANGE RULES AT ANY TIME' when you see something like that always know that anything can happen ,the one way to avoid this is if there is no such rules on the bounty thread.
Bounty hunters still find it very hard to read,they care less about rules and go for the good looking bounty allocation, please have patience and go through rules and regulations ,most times its not always the bounty managers fault.
Sometimes there are changes due to the request of the developer team, but usually the bounty manager always requests KYC at the start of the campaign. This is intended so that when there is a change, bounty hunters can prepare documents. I think the Bounty manager has the right to change the rules and if we don't cheat, I think we will be ready for KYC