If the menu click data is detailed enough then it may already be personally identifying information. You could take tracking data from another software that collects similar information and using ML match these together and suddently you can get a full name from just a bunch of seemingly innocent data (if the latter software is associated with a name of course).

I don't know what data they collect now or what they will collect later so I am just speculating. But I am sure the ToS has a section about how they can change the terms however they wish.

Please tell me about the great lengths they go to anonymize this data because I believe it to be very difficult to do, and absolutely not in their interest.

Edit: With pasting habits I meant if you paste with shortcuts or go through the menu, not the actual paste content. Sorry for the confusion.