"They are already putting their trust in the Tether Foundation (risky move). Now, they have to put their trust in Tether and in you, a random and unknown entity."

No tether would just be some form of payment, you could easily use paypal or moneygram or creditcard, it doesn't matter, I used only tether in that example because I hadn't thought the whole way through on that yet.

"You are facing counterparty risk (Tether) and probably can't scale due to restrictions on purchasing/selling USDT (banking regulations and so forth)"

eh, well, hopefully what I said works there as well.