Injective protocol did the same thing to bounty hunters. Team tried to say that Ethereum transaction cost is high. That's why they changed the rules. Ultimately, they send tokens in the same wallet as they distributed in the first two weeks. Maybe teams are waiting and changing rules several times until they confirmed that so many bounty hunters didn't follow the new rules.
I'm pretty sure that there are some bounties that did something like that, bounties that do not use an independent escrow that is not part of the project can always pull something like this, they can always change the rules in a way that benefits them and that they know a great deal of bounty hunters are not going to accept and save themselves a great deal of coins, and then when the bounty hunters point their fingers at them and accused them of cheating they can always say that they just refused to follow the new rules and that they would have been paid if that was the case.