Wow, I'm surprised that NiF (even just the English side) has fewer works on AO3 than SSSS! It certainly seems like a bigger fandom overall (even just the English side). I guess SSSS is just more fic-intensive and/or AO3-centric? I guess, thinking about it, I do tend to see more gifsets, memes, and meta/analysis for NiF than fic or fanart.