Thats right just as the title says if you are a member of the US Club Nintendo you can gain coins through a survey. This will appear four weeks before the game is released, the idea behind this is to see how many persons plan on buying the game. As said in the news on the site “The Legend of Zelda: Ocarina of Time 3D launches 6/19! Tell us you intend-to-buy before 6/12/11 to receive extra Coins when you register it!”

As a member of Club Nintendo, you may participate in the Intend to Buy incentive. Log in to your Club Nintendo account, and 4 weeks before a game launches, the option to register your intent to buy the game will appear here. Let us know you plan to buy the game, and take a short survey. Then, when the game launches, buy it, register it, and complete the registration survey and you’ll earn 10 extra Coins!
Remember, you must indicate your intent to buy within the Intend to Buy date range listed for each game to be eligible for the extra Coins.

So if you are a member of US Club Nintendo then you should take part in this for some extra coins.

Source: US Club Nintendo