Presumably in response to https://www.telegraph.co.uk/business/2026/01/08/musks-x-coul... and others. I've seen a claim that Spain is referring X for prosecution over this as well.

It's just been restricted to paying customers, and that decision could be driven as much by cost as by outrage.

Edit: may also be linked to people making deepfakes of Renee Good, the woman murdered by US authorities in Minneapolis.