I think it’s a community thread-like social chats where everyone is asked to share something or like a game. They are sometimes created by moderators if the original posters cannot or aren’t allowed to make community threads. You might have been the first poster to reply to original post so it appears as you created it.

Are you already in Argentina or still in the US? I’d love to see South America. Would be so interesting. How long are you staying? I know you used to live there