Dwango has inked a deal with Paypal Japan that allows users of Nico Nico Douga to pay their monthly subscription fees via Paypal. So far, Nico Nico users were just able to choose between payment via credit cards or the monthly cell phone bill.
Obviously, the motivation for Dwango here is to make it easier for users to become a paying member of the service and to boost revenue, even though Paypal in Japan is not as popular as in the US or Europe (Paypal is said to have 1.5 million Japanese users).
Nico Nico Douga currently counts 1.12 million premium members, all of whom pay 525 Yen/$6.40 per month for some extra bells and whistles, for example to view videos in HD quality.