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? 
The best thing to do is to just keep it in your wallet as a remembrance, why? selling it would just be a problem for you because of the transaction fee in order to sell it. So perhaps you'll be earning profit from shitcoins, that will just be few cents so selling it will just be a waste of time. The profit you'd get will just make your feeling bad because you have exerted effort in it.