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? 
Nothing you can do with those tokens and it is called as dead weight tokens,all you can do is creating another wallet and send all those tokens to those wallet and hoping some of them will get listed in future if their development team wake up but remember you will need Gas to send them tokens.