Doge memes are far worse than any spongebob memes. First off the resurgence in the doge meme's popularity is so mainstream that at this point it's basically a new normalfag meme again. I see doge memes like everywhere I go. I see them almost as much as I see wojaks and pepes. Actually now that I think about it, I see them MORE than the latter these days.
Secondly, I can't even think of a meme that encapsulates gen z ironic meme culture more than the doge meme. That meme attracts cancerous ironybros like flies on shit.
That said, from what I can tell the "no outsider memes" guideline only ever gets enforced on wojaks and pepes probably because the guidelines specifically name them. I've seen every other mainstream meme here under the sun and they don't get removed.