Please tell me how to use bing.com cashback account.  I have signed up for the account and went into the link for macys 25% off but it kept directing me to the store's website.  Do I just purchase egift card with the full price for now?  then the bing.com will give me the cash back or does Macys give cash back?  Also when I purchase does it say that I am getting cash back from bing.com?  Please help me.  I want to go buy a sofa tomorrow and I would like to get the gift card today! also Macy's having promotion tax free right now.  Does that void the cash back or it doesn't matter since i am purchasing the gift card?  Thank you.