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STEEM with be the base currency pair for all SMT's when using the STEEM Decentralized Exchange. For both Buys and Sells.

If you can sell SMTs for Steem you can buy SMTs with Steem. I don't follow you.

Not quite sure about that. Can't you just make it so you can only sell it? Not to a private user but some Steem official place. Not quite sure it takes some more thinking to consider. Markets are interesting and can be complicated.

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