User blog comment:TheFlashIsBitchin'/Multiverse/@comment-31614978-20171216135305

If I had to hazard a guess, I'd say it was either because Harry just assumed there were infinite but learned better when he formed the Council of Wells, or the 52 refers to something like 52 worlds that we know about or that have been charted by nice people of the Multiverse. It seemed the only reason Earth X wasn't considered to be part of the 52 multiverse was because it was a shit hole and "that no one goes there". But what makes Earth X so special that its stricten off the record when we've seen one Earth that was a literal hellhole with its own broken moon (i.e during the battle between Vibe and Gypsy)?

I cant see it being Flashpoint as I don't really see how the change to one timeline would reduce one infinite multiverse to 52, especially when its been explicitly stated that Flashpoint was contained to Earth One.