Sort:  

Yes and no, let me explain.
They are currently one of the major advertising partners of Steemit Inc.
So in that sense, they actually do 'support' Steem.

On the other hand, Steem is not listed on their exchange, so in that sense they do not support it :P

Commissions are fair IMO, just 0.5% on each trade. They also do not overcharge on network fees!

Coin Marketplace

STEEM 0.29
TRX 0.12
JST 0.033
BTC 63732.43
ETH 3135.73
USDT 1.00
SBD 3.83