I hope this is kosher to post this here - might be moot since most have Season Passes.
http://www.sixflags45.com/
Thanks for taking advantage of this offer from Six Flags Great Adventure. Here's all you need to do:
• Select the day of opening weekend you'd like to go.
• Fill in all required fields.
• Submit your information.
You'll be sent a promo code by email within 48 hours to print your tickets.
Found it over at http://www.fatwallet.com/t/22/591383/