Maybe I shouldn't be surprised, though, because FB stated clearly that you cannot delete your data. I just didn't believe they would keep it for so long. It felt weird.
Edit: Just a fun addition, I also made a fake account to promote Youtube videos against FB's EULA. To get more viewers I thought it might be a good idea to make arbitrary friend requests and must have had a certain tendency to click on attractive women. Curiously, at least half of them accepted immediately. One week later I got spammed with friend request of two kinds:
(a) Asian manufacturing sites offering all kinds of machinery and services. Most of them from China, but also some in other countries.
(b) Women posting half-naked pictures of themselves on FB, apparently doing that for a living.
None of them were my target audience. I guess successful FB marketing is more complicated.