Six Flags Over Texas opening weekend tickets only $18.36 for March 2nd or 3rd

Don't know about the other Six Flags parks, but the Six Flags Over Texas located in Arlington is offering tickets for only $18.36 online for their opening weekend March 2nd or 3rd. Just be aware they usually charge a fee for buying tickets online usually around $5.00, but still cheaper than their regular ticket price of $59.99 if purchased at the park.
Link to Six Flags special offer:

http://www.sixflags.com/overTexas...index.aspx

Edit: Don't forget to save an additional 5% if you use a Discover card.