Specifically HITBTC charges something like 100+ MAID to cash out, this is 10x higher than others. Compared to 10 MAID at Polo. They also fake their volumes at HITBTC. Not sure what your experience has been with Polo but as a recent user I have had 0 problems since I joined. Their support is non-existent but just don’t click the wrong buttons has been my advice to using Polo.
Edit - Purchased 1200 maidsafe coin on HitBTC.... withdrawl fee was 200 (20%). Why? , well maybe its 200 actually. so 20x lol…