Yeah, surely we already know that there have been ICOs that pay hunters with ethereum and xrp coins. But that happens if ico project developers care deeply about the quality that determines the future fate of their coins in the future, because they are serious about creating their coins. The coin will have the direction to suit the purpose of the whitepaper of the project.
But unfortunately, there are few projects that make it to the top for various reasons. So eventually the project became undirected and died in the end.
The last project that I can remember is an injective protocol campaign. This projects promised to pay Ethereum every two weeks but this project also cheated bounty hunters. Change the rules 3 times to reject more hunters. Most of the time stablecoin paid promise campaign rewards is very low, where some of them are fake.
When a project changes the bounty campaign rules very often, it is better to leave the campaign immediately. This most often means that they do it purposefully so as not to pay bounty hunters for their work. Sometimes the rules are changed to remove spammers from the campaign, and such changes are quite fair. However, then pay those who have earned something before.