It's from r/todayilearned:

No recent sources. Any sources (blog, article, press release, video, etc.) with a publication date more recent than two months are not allowed.

They shortened it from two years to two months iirc

Sorry i should've elaborated on that. It just made me think about rule suggestions and during the process i realized that the post was not a problem other than its title being that.

Can the mods of this sub make more firm principles on posting rules? This title has nothing to do with the definition it's describing. Instead, it's an example of it. I'd consider opting out of here if nothing changes. Posts like this would've been removed on reddit. It's a place for what people learned, not for what people feel about what they learned. It's impossible to remove subjectivity but this post imo crossed the line.