I have done some bounty campaigns that were unsuccessful.. Also some were scams. But I have received some tokens from few of that projects. So I need to know this, Is there any opportunity that can I use this tokens? 
If you are fortunate, you might sell it for people who might want that coin so far, but the chances is really low, if there's an opportunity to sell it, let go of it, its developers are quite not active now and there's no future with it.