0.0062 BTC at the current price of 140USD is 8,68% fee.
Actually it's about 10.4% in 30d considering contango. Time decaying thing.. Hmmm..
Actually, another issue is the scaling of the fee. How about charging a proportion of the BTC exposure? It would be in keeping with the spirit of the contract.
I guess it's never gonna happen. They are russian. I know how fucked up things can be when you are down there..
My personal suggestions for increased liquidity - rebate for adding liquidity (ie maker/taker)
That's how it was done on the bitfloor. The spread was virtually zero all the time. Very effective..