Good post. I have an AMD RX480 that mines at 21 Mh/s and I also have 21 Mh/s Ether mining on Genesis Mining. They do pretty much the same. I get a 0.05 ETH payout from both about every 3 days. It's not so much the mining difficulty that makes your profit less, it's the daily maintenance fee(covers electricity I think). If I subtract the electricity cost from my GPU, they're pretty much dead even. Also, we're calculating profit at current exchange rates. If you believe the coins will be worth more in the future, then it could be very profitable at a later date. Hell, I still mine BTC with a jalapeno from Butterfly Labs, because I believe the small amount it mines will be valuable one day.