Sort:  

I guess that depends on the exchange. most-likely an exchange has also a steem account, so they get the same interest. In case of bittrex i guess its this wallet : https://steemit.com/@bittrex/transfers
The question is now if they give the interest to their users...

Coin Marketplace

STEEM 0.17
TRX 0.13
JST 0.027
BTC 60603.53
ETH 2702.02
USDT 1.00
SBD 2.44