I happened to come across a profile and noticed that some games that are on their creations page are not games that they’ve made. I’m not quite sure if this is me or if it’s something that I don’t know about. This is the only profile that I have seen that has this.
It looks very odd to see games on someone’s creation page that weren’t made by them. Saying that, I assume that this is a web bug.
TL;DR - games not made by player are on their creations page.
Maybe it’s a similar exploit as when people were able to put any hat/etc on their profile even if they didn’t own it. Or maybe this also happened before that was patched, and it was never reset.
Although a bug I can’t really see an issue with this, it’s free promotion for the game owners. In fact, I like the idea of users being able to share their favorite games (just make not using a bug like this).