ETC for the last few months has been having bad 51% attacks. So bad that most exchanges have disabled deposits... some have disabled withdraws and others have like a 2 WEEK confirmation period (Coinbase).

So there is a reason why its more profitable to mine than ETH its because its risky. The last 51% attack ended up reorging 2 days worth of blocks. So if you mined during that time you would get absolutely nothing in return for your work. It would be a waste of electricity pretty hence.

Hence why miners rather than ETH which is more stable and less profitable.