Through your signature campaign rewards, I was able to try this "trade mining" and your airdrops. I have to say I'm positively surprised!
I'm exchanging my BTC rewards from your signature campaign to NXY, taking bonus NXY through "trade mining" and on top of that free ETH every day! That's a nice way to receive passive ETH until it finally goes PoS.

My only complain: I find your withdraw fees a bit high. Sure they don't sound expensive when you think of the today's exchange prices to fiat, but the mining fees have also dropped significantly from when you last updated your fees. Maybe you should look at those again, personally it was enough of a reason to keep me away from using your exchange in the past and it's unfair for you since you have such a good system built.