I don't think that's true at all. If you're willing to believe that they will do evil things with your chat messages, I don't know why you would have trusted the "This chat is off the record" message in the first place.
I can think of many other possible explanations for the change that, while you may not agree with them, are at least reasonable.
If they were doing genuinely evil things, they'd simply have been lying about not saving logs all along, no?
> Care to share them with us?
If someone has "off the record" mode enabled, you can't send them a message if they're offline. Makes sense, but it reduces the usefulness of the service for both parties and it's kinda confusing.
I can think of many other possible explanations for the change that, while you may not agree with them, are at least reasonable.