I have no idea was EAS is, but it's free. I'm going to check some stores out this week and see who has it and get back to you, unless someone already knows and could leave a comment.
The coupon is for $3 off any EAS product. It is some sort of health drink or bar, it would be in the health section of the store. Go HERE to sign up and print off your coupon. Remember that you cannot copy coupons. Even though it will allow you to set your printer to print off more, the store will only get payed for one coupon you print out. If you want more of them, and you have wireless internet and other wireless devices, you can use..say..a laptop to print off another. One coupon per computer, not per printer.