ROICoin is relatively new. I just discovered it myself a few weeks ago. It is listed on a few small exchanges, but the problem is no one is currently trading. Everybody is depositing due to the huge returns. The original deposits are maturing in the next few months, so consensus is that the market will start opening up as miners start selling to recoup costs. The devs are also pursuing listings. There has been some bad luck with exchanges in the past, so they're being cautious on choice of new ones.

As for power used on these beasts, I'm currently paying that out of my pocket. Of all the coins I've researched and mined this one stands way out above the rest for me. I see a tremendous opportunity. I also believe this thing will take off and become a top coin in the future. I might add that the target audience are the GPU miners with their CPU's not doing much to contribute to their endeavors. Not many miners are dedicated to just mining ROI as I am.

The thing to do would be to research ROI. I have, and I'm impressed! And do the math on deposits.....