It's just new slang like mfw, few, fml, catfish, dm, etc It's helpful to have a sort of common language over so many cultures by all sharing internet culture. When you see something like 'okay, but also' you know that likelu even is the point, that there is something they wanna put out there that they know wouldn't have a normal opportunity to and it's being playful about it not taking themselves seriously.

Oh wait was that a rhetorical question?