sethnintendo on 25 November 2011
Not sure, I thought it was just for Nintendo systems and published games. I assume perhaps they might expand it for certain third party games. I assume there is no official rule regarding only 1st party games can earn coins. I even tried to look further into the matter and was unable to locate anything in their faqs about 3rd party games.
http://www.nintendo.com/consumer/club/en/faq.jsp
