To become a bounty campaign manager, good trust is needed. because trust can give good results. and I think reputable bounty managers already have the trust and experience and have a lot of followers so that reputable managers can determine the offer in terms of payment. maybe you can easily become a bounty manager but you will have a hard time getting the trust of altcoin developers.
Being a bounty manager is not that difficult, but when you run it it will always be difficult, not to mention getting the trust of everyone including altcoin developers who sometimes also want to make special rules for certain things so that nothing is easy that can be done by anyone. because it is also related to making money.