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Also FWIW, I deployed @teamsmooth-mm, which is an AMM (albeit with only private capital; not really feasible to have LPs without smart contracts), on Steem in October 2016 well before the 2017 Bancor ICO. It might have been the first AMM on a crypto platform, I'm not sure.

Hive needs smart contracts :)

Yeah I worded that in a very unclear way.
Should just be first popular instead of first and most popular.
And now let it be immortalized on blockchain for all eternity.