For reference, it has been three recently.
I didn’t include the day I woke up and 200+ models had been removed from my account because as I had a shared that before. It was some overzealous staff member who decided they were non-compliant and it took a few days for them to be restored.
No notice, nothing, just a devastated catalogue, tens of thousands of points gone and a dumb message from a more containing unrelated boiler plate.
And, no, no pre-warning.
The three I mentioned here were the recent ones, there have been more than this and not including the single batch I just mentioned.