It's owned by the same person and there are zero legal protections against him doing the same to the API whenever he feels like it.
Beyond the ethics of financing that behavior, anyone who sees what they did on the X integration and still uses the API for any user-facing purpose, clearly does not consult with their legal team enough.
Musk said he wants to "dewoke" Grok by retraining it on filtered data. Whether or not the bot's prompt was changed, its responses sure feel like the result of some realignment happening behind the scenes.
The x bot have obviously recently been tweaked to be like this.