I'm using my 3 to mine on prohashing with a payout of Verge. Doesn't make a lot of sense to mine LTC imo with how little you earn, better to pick a coin that trades under a dollar, stockpile some, and hope it goes way up in price.
Can you explain how to obtain Verge using this key?
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On prohashing it automatically mines the most profitable scrypt coin and you can get your payout in the coin of your choice.