Gaming Nintendo of Australia Extends Abassador Program

[Shiro09]

The registration period for the Ambassador Program has been extended in Australia. The process, which still requires you to have purchased your 3DS on or before August 11th, now involves having to download and fill out a PDF from Nintendo’s site. You’ll also have to provide proof of purchase.

This offer will stand until September 30th so if you haven’t registered as an Ambassador, you have your chance. There’s no word yet on whether the extension will also be happening in other territories. And, just to clarify, the filling in of the form (and the rest of it) is only required for people who haven’t already registered by connecting to the eShop at least once before August 12th

Source

I think this means that people that didn't go on the eShop get a second chance and people that already has doesn't have to do it.