I work at Macy's, formerly Foley's. We never got to preshop and I doubt if Macy's will let us either. With Foley's, you have to use your credit card to get your discount and also Macy's. I don't let anyone use my cards except my husband...:) .
The problem with shopping on BF is that I usually get stuck going into work when the store opens. Was 6 AM but Macy's might be different.