CASTLE ROCK, Colo., Feb. 15, 2018 /PRNewswire/ --- Riot Blockchain, Inc. (Nasdaq: RIOT) (the "Company") today announced that it has entered into a definitive agreement to acquire additional cryptocurrency mining equipment consisting of 3,800 Antminer S9 Bitcoin miners manufactured by Bitmain. The Antminer S9 is considered the world"s most...

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