Save $50 when you spend $150 or more on select OPEN partners - Costco amex card

I received the following email from amex. I have a Costco business card.

This could be coupled with the site offer to make it sweet. For example, you may be able to buy xbox from Microsoftstore, less $50. Though i dont know if their pricing is competitive.

Now through March 16, 2012, get a $50 statement credit when you spend $150 or more
at one or more of the OPEN Savings partners featured here1 – that's on top of the automatic
OPEN Savings discounts.2
Just click below to start saving.

Save 5% on office supplies, technology, and furniture
at officemax.com or 900+ OfficeMax Store locations.

Save 5% on technology solutions and more
at microsoftstore.com and Microsoft Store locations.


Save 5% on business credit services at DandB.com
or 1-800-536-1310.

Save 10% on records storage, shredding, and data
protection services at ironmountain.com/opensavings
or 1-888-410-5963.

Save 5% on WorkForce® printers, projectors,
scanners, and more at epsonstore.com or 1-800-873-7766.