Your one-liner is more apt than their copy, which is a little confusing: "A curated social marketplace app to buy and sell vintage, one-of-a-kind, handmade and hard-to-find items".
One problem Fab has is that they sell a lot of stuff that has very little utility, which means people aren't very engaged once they've purchased a $30 propeller hat or plastic bar stool. Square Market took the really curated, high quality approach instead.
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