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I read that some time ago.
What I mean is will Bittrex, BlockTrades, poloniex, and openledger (and perhaps other exchanges that I'm unaware of) have accounts on Steemit .

Will Binance or will we need to use BlockTrades?

Binance has accounts under the names @deepcrypto8 (where your transfers to the binance exchange go when you send them) and @binance-hot (where the funds seem to be being transferred and stored afterwards - about 2million Steem in there currently).

sneaky..

Sorry, I don’t understand your question. This is a post from the Binance exchange, and they obviously have an account here since they are posting with it. They support STEEM on their exchange now, so they are interfering with the Steem blockchain. What would you need to BlockTrades for that isn’t supported by Binance?

interfering?
er...okay.
they answered my question . (see above)