If you already have Steem on Poloniex, you can sell it for Ether or Bitcoin, then withdraw. It is not possible to withdraw or deposit Steem at the moment. Myself, I did deposit steem 2 months ago, they did not credit my account yet, nor answer my ticket. So basically there is nothing I can do.
There is nothing wrong with steem platform, the problem is with @poloniex shitty customer service. I deposited SBD on Jan28, price was $7.20, they still have my SBD but price currently is $1.57.
