In my case it was trivial to unsubscribe, but they then started sending me all kinds of letters in regular intervals. And never stopped, I still get them years

In my case it was trivial to unsubscribe, but they then started sending me all kinds of letters in regular intervals. And never stopped, I still get them years later. I'm certain by now they paid more for those stupid letters and pens than I donated in the first place. Which is yet another reason for me to never waste money there again, as I now know where it's used.