If you go to www.nerfperks.com, you can create an account and begin uploading pictures of your purchases since the end of August to earn points. Specifically, the store receipt. You can then use your points on anything from computer wallpapers to blasters and ammo.
There will also be various promotions for earning extra points, including a Blaster of the Month that is worth double.
THIS is the eligible list of products you can redeem points for, as of September 2015.
So, if your group is in need of a particular blaster or ten, buy a few and get some points while you're at it!