Why is S17 trading is USDT instead of BTC?   I don't even have access to USDT and I really don't want it.

If hashnest wants to use USDT there should at least be the option to instantly convert it to BTC.   This seems crazy to me.  I mine, get paid in BTC but have to buy in sell TH/s in USDT?   It doesn't make seen.   Also there seems to be a lot of dark scandal clouds hanging around USDT.   It doesn't even seem to be fully backed by USDT so holding it is a double risk.  You risk the long-term growth of BTC and you risk a collapse of USDT if Bitfinex goes down.