Digging this post up from the grave because I've just learned the greatness of it! I can mine for ONION with my Antminer S9 because it has an autoexchanger! My miner mines SHA256 coins all day long randomly picking and choosing based on current profitablity at the time then once the blocks are found, my shares of that coin are calculated they get autoconverted into onion...  The only problem is that they always seem to be low on Onion for payouts, and I have to keep switching back to getting paid in BTC or LTC. If they had a steady stock of onion I'd be mining around 8-9 onion a day which is pretty damn good in my opinion!