Here's how it worked for me:
I got the freebies at Office Max yesterday using my MaxPerks card number. It was free shipping because it was over $50, plus going through Ebates made it an additional 3% off and I got a $5 rebate added to my Ebates account. I made money purchasing our office supplies this month! There are TONS of stores that go through them.
So, for your internet Christmas shopping make sure you shop through Ebates and use me as your referral! They'll be benefits for both of us=)