Are fees on BitMex cheaper?  Upside and downside contracts don't offer a make credit.  Perpetual contracts are -7.5bp to take and +2.5bp credit to make. 

LXDX warrants are -7bp to take and +3bp credit to make.  Cash products in ETH and BTC are -4bp to take and +1bp credit to make.  XRP and USDT are ZERO fees both on the make and TAKE.  Seems cheap compared to other exchanges.