This is made possible by the site's partnership with Coinbase, a Y Combinator startup billing itself as "the simplest way to buy, use, and accept
OKCupid's basic service is free, but a $10-per-month "A-List" subscription unlocks special features like sending a message even if the recipient's inbox is full.
Coinbase will turn the Bitcoins into more conventional currency for OKCupid, keeping a 1% transaction fee for itself.