[fidotron]

TBH it is kind of amazing we don’t regulate these change of terms more strongly.

As you rightly point out it is causing a justifiable lack of trust in things you actually pay for which is going to be very counter productive.

[Incipient]

Regulation is hard. Especially for contracts. You can couldn't add "it's illegal to retroactively change the terms of a contract" because there are often terms in a contract relating to just that. It's often required in certain circumstances.

In an instance like this, I'd say "market forces" isn't entirely the wrong approach. Everyone migrates away from them and destroys their business.