Technically, it wasn't a bootleg. Outside the USA, Orwell is in the public domain. A public domain copy was uploaded to Amazon with 'Global' rights. People in America bought it for 99 cents. The American rights holder complained. The rights listing was changed to "the rest of the world".

Then Amazon had a problem. What to do?

They couldn't give the 99 cents from the US customers to the American publishers because it (A) belonged to the publisher outside the US and (B) the American copies were $9.99 so it wouldn't have been enough.

They could have prompted the American customers to pay the difference, then compensate the American rights holders.

They could have done nothing.

But in the end they said 'we didn't have the right to sell you this in the first place so we are taking the book back'.

Gross but similar to what happens when you change the country code for your Apple ID and things you bought disappear.