>>124159715Even if you look at the furry side of the fandom (FiMFiction) you can see that the fad died at the end of 2013. And mind, the furries are the most die-hard fans ever, the "thick tail" here doesn't represent overall popularity, it represents popularity among diehard fans, furries who read and write fanfiction.
Equestria Girls wasn't a fandom engine-stoker, it was a hanger-on that rode on the popularity of seasons 1 and 2.