Title pretty much sums it up. Here’s the link to their profile:
After checking all those games, it seems it only happens to paid access games.
Maybe buying a game combined with never using “Add/Remove to/from Profile” creates this bug?
(idk, but having it only happen to (ex)-paid games seems too much of a coincidence for a bug like this)
btw it’s not like the “add hat to profile” bug, the “add place to profile” API does check for ownership.
(maybe that wasn’t the case a long time ago, but those profiles don’t seem of people that would do that)