Update: The game no longer appears on the "Earn Coins" page on Club Nintendo. It may have been an error, and it is unclear if the deal is still in effect.
Yesterday, a free version of Namco's Wii U launch title Tank! Tank! Tank! arrived on the Wii U eShop, with additional content available for purchase by those who want more options. If you haven't already downloaded the free-to-play game, here's an incentive for you to give it a chance: Club Nintendo is currently offering 60 coins to those who download it and complete a survey. Not bad.
Source: Nintendo World Report