Tether has always had very shady business practices, but that is out right fraud if they are doing that. More reason to only trade with USD backed exchanges and no USDT ones. I'm no fan of the twins but at least I know they are regulated and located in the US so they can't do this without facing some prison time. Overall, I will celebrate when USDT is no longer a thing and exchanges are using a more stable medium. I will be interested to see how this affects BTC in the long haul.