I never heard of Night Vale until 2 minutes ago, and now I have two posts on my Friends page about it! Do you follow Copperbadge? He has a couple of fic recs here
I hadn't heard about it two weeks ago, so - it seems to have pretty much exploded into fandom recently, and from what I know of fandom, it probably has something to do with a particular pairing having become canon. A bit like Vikings fandom basically leaping into existence alongside the words "Come join us, priest." :-)
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