The picture in that tweet (IMO) only states that a lot of people who get their hands on USDT didn't buy them with USD but with crypto (on any of the big no FIAT

The picture in that tweet (IMO) only states that a lot of people who get their hands on USDT didn't buy them with USD but with crypto (on any of the big no FIAT exchanges like Binance, Bittrex, etc). This can at some point create a price difference between USDT and USD that people who do have access to redeem Tether will arb - the people buying USDT on these exchanges are driving up the demand for USDT. IMO seeing anything else in that comment is conspiracy (which might or might not be true, but you can't read that out of the comment).