it's not that straight forward to find good bounties that pay good, because just like prices of token and coins, you can't foresee which coin will perform well and which not. There are many things that have to work out in order to get involved in a good bountie. It starts with the project itself, is the project any good? Because if it is not, and even though it will be paying out a bounty, it will not attract any money and you won't be therefore rewarded accordingly. If the idea is good you can look into some time reading the whitepaper or whatever technical documents the project has releases (blogs included) the more you read about the project the more of a clear idea you will have whether it's worth investing your time in it or not.