I made a quick resume about tether here:
With Bitfinex you can deal with a USD/USDT pair and it's the only place. Bitfinex is like the unqiue issuer. Not something to be surprised about when you know Tether & Bitfinex have the same CEO
If tether does not pays his creditors, will Binance and those others survive?
That's a good question, I would like to know the answer to it