Step 1: Log into Facebook.
Step 3: Click save offer.
Step 4: Click here to go to your offers page on Facebook and find a one-time-use $25 off $50 code for Zappos.
Step 5: Shop at Zappos and enter the promo code in your cart for $25 off $50.
A limited number of codes are available.
Once you get a code it will expire on 4/18.