Hi y'all,
While snooping, I noticed that archive.org (The Wayback Machine) had archived snapshots of Six Flags' store pages. From these pages, you can see that, while not showing them on their website anymore, Six Flags is still selling their old and more competitively priced products.
This means that you can still purchase a monthly membership, for example. Or, if you want to pay $79.99 for a Season Pass, you can get a Gold Plus season pass that includes all of the Gold Plus perks (all parks access, discounts, etc.), and isn't limited like the current version of the $79.99 Season Pass (only SFOT, blackout dates, etc.). You can also still buy the unrestricted Season Dining plans.
Just use these URLs to view the products and purchase them if you want:
SEASON PASSES/MEMBERSHIPS:
Gold Plus membership, $6.99/mo. - https://sf-ar.store.sixflags.com/packageList/keyword/20memgoldplus4nf
Gold Plus Season Pass, $79.99 - https://sf-ar.store.sixflags.com/packageList/keyword/22gsp
Platinum membership, $9.49/mo. - https://sf-ar.store.sixflags.com/packageList/keyword/20memplatinum4nf
Platinum Season Pass, $99.99 - https://sf-ar.store.sixflags.com/packageList/keyword/22psp
Diamond membership, $12.49/mo. - https://sf-ar.store.sixflags.com/packageList/keyword/20memdiamond4nf
Diamond Elite membership, $18.49/mo. - https://sf-ar.store.sixflags.com/packageList/keyword/20memelite4nf
SEASON DINING:
1 Meal Season Dining (one meal and snack per visit), $59.99 - https://sf-ar.store.sixflags.com/packageList/keyword/22basdp
2 Meal Season Dining (two meals and one snack per visit), $109.99 - https://sf-ar.store.sixflags.com/packageList/keyword/22pasdp
There are even more products still available for sale, but these are the ones I figured would be most popular. If you're interested in more, just snoop around the Six Flags Over Texas store page in the Wayback Machine. URL here, play around with different dates too! https://web.archive.org/web/20211124191805/https://www.sixflags.com/overtexas/store/tickets . To find the info you need, play around with the Buy Now links (you might need to dig into the page's HTML source).
Thanks,
Jane