I saw many people use bountyhive.io, you can use this link
https://bitcointalk.org/index.php?topic=2809836.0 to find more about bountyhive.io.
However, you have to take into consideration with bounty manager when you choose bounty campaign, don't just rely on the potential of a bounty project.
What the colleagues said above can be one of the references of many references that also exist, for example, as I wrote below, among others;
https://www.kickico.com/https://icorating.com/https://www.listico.io/
We will take that into consideration once we start our bounty project. Thank you for your advice.
Agree that the role of the Bounty Manager can also determine a campaign bounty, because usually they don't accept bounty campaigns that they consider bad, although sometimes that doesn't guarantee it, but as a reference it doesn't hurt.