I believe the term is "hypocrisy."

'pulling the ladder' is an action to sever the opportunity for others to climb after you.

they are merely engaged in self-serving rhetoric. can't even call this specifically hypocrisy because they aren't telling you not to train on on pirated content. just not their content.

Anti-competitive behaviour.

There are several domain-general four-letter terms.

Parasitic behaviour. Extractivism.

Corporate espionage?

Machiavellianism

Closing the door behind you

NIMBYism

Disney?

Capitalism?

"Capitalism"

"Venture Capital"