There is a difference between discount tickets and coupons for Dutch Wonderland discounted tickes. You must take the coupon to the gate and purchase the ticket.
Coupons for discounted admission to Dutch Wonderland are available at participating Subway, Dunkin Donuts, Taco Bell, Wendy's, and Burger King stores. The offer is $6 off Mon-Fri (except holidays) and $4 off on Sat & Sun and holidays. Also find specially marked cans of Pepsi, Diet Pepsi, Mountain Dew and Sierra Mist!
We checked as far away as Clinton, NJ and found the discount coupons for Dorkey Park in a display box on the window sill near the entrance. They were for $6 off Dorney pak admission as stated on their web site.