One of two things happened here: either the exchange, at some point, added BTC to their virtual currencies list (then removed it); or, the media saw "virtual currency" and jumped on the BTC news wagon.
Available evidence seems to indicate that without a doubt they did add BTC to their list of currencies sometime in mid 2013 (http://blog.firstmeta.com/announcement/new-bitcoin-to-usd-conversion) and the subsequently removed it. Calling them a "Bitcoin Exchange" seems like a bit of a stretch at the least.
