Club Nintendo has been experiencing issues as of late. Some members were not receiving coins for filled-out surveys, and issues have been plaguing the site in general.
Nintendo is currently resolving the issue, but assures Club Nintendo users that their coins will not be lost.
Logged-in visitors should be seeing the following message on the site:
“Some customers are currently experiencing issues with registrations and earning Coins for surveys. We are actively working to resolve these issues, and apologize for any inconvenience. Please be assured that we will make sure you receive Coins for any eligible registrations or surveys taken during this time.”