It’s still working, try clicking these direct links using incognito mode
Edit: still working, keep trying if you get the expired message. I just tried it again and signed up for my parents so it’s still good.
If you get the gateway error just refresh and you should get a success message, the site is getting hammered!
It’s back!! Free 12 months Blue Membership
They are giving it to people who stayed in their parks but it’s generic. Enjoy!