

IP address is often enough to link data to a profile for data brokers. And Lemmy has so much valuable data, not only in posts or comments, but upvotes and downvotes etc. This could be someone making bank of selling data.
[Though other people investigating the url seem to be pretty sure the images don’t have a per user url, so this theory probably doesn’t hold]
If that were true in general, wikipedia would not bother blocking IPs.