Expresscoin, which facilitates the purchase of digital currency with a heavy focus on customer service, has added some more altcoins to its mix following a round of voting.

The winning coins were Darkcoin, Litecoin and Blackcoin. Customers will now be able to buy these coins through one of their several payment options. Among altcoins, Darkcoin and Blackcoin have come to rank near the top in 24h traded-volume, particularly on altcoin exchanges like MintPal.

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Prior to the addition, only Bitcoin and Dogecoin were supported. While Litecoin is usually the next in line in the majority of such venues, Expresscoin has taken a bit of a different route. Speaking to DC Magnates, co-founder and CMO Joe Hsieh explained that Dogecoin was the perfect experiment for altcoins because of its active community.

Voting is still ongoing for future coins. Candidates are diverse, from highly exotic coins (Myriadcoin) to those used for decentralized exchange (Ripple, Counterparty, Mastercoin) and second generation digital currencies (Nxt).

Expresscoin reports close to 20,000 “active paying customers” and to have transacted $15 million in their first year.