Ebay sent me an email a while ago about changes in their Terms and Conditions, ending with the sentence "You do not need to do anything". They are valid from yesterday - and apparently if you don't do anything (like I did), it grants ebay permission to use your data for training of KI.
Aaargh. And have I mentioned aargh? Thankfully I have the Most Patient Husband of Them All, who sent me info about this today, including on how to deny this. (Obviously if they already used your data, that's done, but at least you can disallow anything new to be used.)
If you want to read a bit more in German about this, here's a Spiegel article. And if you only care for the "f* off and leave my data alone"-link, here you go. You will have to log in, then move the slider from the "yes" to "no" side.
And just in case you have not guessed yet: I am very much not amused.