> The freezes apply only under direction from the federal government.

Tether chose to build in a freeze capability.

> Tether has no control of its own here, and Amazon won't either.

Neither can say "no" to a legal order from a government with jurisdiction over them. Both can say "no" to you voluntarily, even absent a court order.

An Amazon stablecoin will exist for the purpose of Amazon's own benefit, not consumers'.