That got me curious about what their rules actually are. From their terms of service [1]:
> Tether reserves the right to delay the redemption or withdrawal of Tether Tokens if such delay is necessitated by the illiquidity or unavailability or loss of any Reserves held by Tether to back the Tether Tokens, and Tether reserves the right to redeem Tether Tokens by in-kind redemptions of securities and other assets held in the Reserves.
Also, US citizens aren’t allowed to use their service at all.
This seems sort of like an unregulated ETF that keeps all profits from investments for themselves. Easy money if you get it. If they don’t get too greedy it seems like they could keep it going indefinitely?