Could be wrong, but if Steem-engine gets approved for buying steem with fiat
Who do they need approval from?
Judging from their size, I doubt that they would have the liquidity to run a fiat exchange. I would like to see them move from pegged alternatives to the actual tokens first. BTC vs BTCP, STEEM vs STEEMP, etc.
I'm sure there's a technical reason they need pegged versions of the tokens, but I can't think of a good one at the moment.