Many bounties I've promoted ends up in delays one after the other and I'm getting tired of it ,I've been promoting projects since march 2018 and so far I can't say I have something to show for it . All I have is token value in ICO/IEO price ,no listed on exchanges..
If you are not getting any, then you need to look deep into yourself too and see if there are things that you are doing or getting wrong yourself, Probably you focus more on picking projects randomly to promote rather than first making a research on them first, and this is where the mistake starts from, you have to be at least 80 percent certain of what you are promoting before going for it.