It means if you're going to download something use the US server if you can to help work out some data with the fixed US server. Or if you're not going to download anything you should find some free games and download them from the US server just to help out. If you have the extra points though you could download something bigger to help get more data.
Oh okay. I was wondering. Good thing I decided to download the Call of Duty games for DS to try them out to see if I like them.