It doesn't make sense.
Bullsh!t. Every margin trader is doing that.
True. Though not every margin trader gets to print the currency with which they buy BTC.
It's pretty well accepted that the creation of new USDT tends to occur at key points in the trading cycle.
Margin traders borrow money that might or might not exist at the time trade is done. That's what banks are doing all the time while trading. They borrow overnight to finance their trading positions.
Nobody knows in advance where are the key points in the "trading cycle". Those points become key points only after somebody invests a lot of money buying or selling. In this case acquiring a lot of USDT and selling them for BTC.
By minting 100m usdt, Finex become the trading cycle. That's the whole point.
Every central bank is the trading cycle for their respective currency. USDT is a private currency of Fiinex. It is quite natural if Finex defines the trading cycle of USDT.
Fed is the trading cycle for USD. Finex is the trading cycle for USDT. Get used to it and move on!