Aside from the being a way of providing free entertainment to the Nintendo 3DS with Puzzle Swap, Find Mii and Find Mii II, the new StreetPass Mii Plaza now also features premium games that also make use of the StreetPass Miis.

According to Nintendo president Satoru Iwata via an interview with Toyo Keizai Online , the  four new StreetPass Mii Plaza games have generated ¥400 million in just one month.  Considering that Nintendo has not made huge efforts in advertising them apart from the changelogs from the firmware updates, it’s a run away success.

“With the 3DS, there is the StreetPass Mii Plaza, which you can use to play games with Miis that you meet by walking past other people carrying a 3DS. However, because people were growing tired of playing the same couple games, we have, in fact, brought four new StreetPass Mii Plaza games! Four new games have been added, where you can buy one game for ¥500 or all four games at a discounted price of ¥1500.”

“One month has passed since we added these new StreetPass Mii Plaza games, and we did not use any type of mass advertising. It was written on our homepage, with information about all the new content included in the update. You are also made aware when you visit the StreetPass Mii Plaza for the first time after the update, but we didn’t use anything like television commercials to advertise.”

“However, in this state, we have generated a lot of income from our customers. Furthermore, a lot of the people who are playing and enjoying the new games are communicating and advertising through outlets like Twitter. Thanks to this, the circle of customers is growing bigger and bigger, and interestingly, sales were a strong ¥400 million in only a month.”

source Nintendo Everything, via Toyo Keizai Online