USDT maintains its peg by allowing certain entities to redeem USDT 1 to 1. How much USDT's price fluctuates depends on how well that mechanism works, and market conditions.
Are you just making stuff up? There were $10B worth of redemptions only last week.
Documenting a redemption would involve using the official redemption mechanism where you redeem $100,000+ at a time, pay a $100-$1000 fee, get a wire transfer from Tether etc. If you can find anyone ever documenting having done that, let me know
But, what I said was it’s never been documented.
* Does he buy Tether at par or at a discount?
* Can he redeem when he wants, in any quantity, or do they have arrangements?
* Is he redeeming for dollars or in kind? Terms allow for latter
* Does he buy with dollars or with commercial paper?
I do not believe he has shown material which would let us answer any of these questions
the 'fee per fiat withdrawal' is 'The greater of $1,000 or 0.1%'
so it would theoretically make sense for the peg to be 0.1% off as there is no more profit from redemptions at that level.
A peg is a peg, it's supposed to be more or less certain.