Topcashback is offering 12% cashback at Dell.com, valid only today, March 18th. (See other portal rates on CBM.)
This is useful for those with the Business Platinum, as you get a semi annual $100 dell credit. There’s also an Amex Offer to get 10% back at Dell, read more on how to maximize the Dell credit here.
Related, Shopathome is offering 11% today for Saks Fifth Avenue purchases. That can work well for the bi-annual Amex Saks credit.
