MinerGate is not a scam... I started out on in before I learned how to do real mining and was able to move off every single fraction of coins I earned there.  It's a decent place to start out for newbs who are learning about mining, but you will eventually need to go to Claymore or Wolf miners or Nicehash if you really want to earn the most out of your rigs. 

Also, certainly MusicCoin is still profitable and not only that, it's been right on par with or better than ETH for the past few months now. As others have mentioned, a simple check of whattomine will show this, although certainly all newer coins do not show up on there.