Update as of July 2015: The latest Supercard now costs P499. You can get it at any Shakey's branch and from Online thru Delivery.
You'll get a large thin crust Pepperoni Pizza, which normally costs
Aside from the free pizza on your birthday, you also get a free pizza when you order thru delivery.
You also get 10% discount whenever you dine in or order food for take out.
And it's also a loyalty card. You will earn 1 point for every P100 Dine-in or Carry Out purchase. That's a rebate of 1 peso for every P100 you spend!
The card is valid for an entire year. That's 12 whole months for you to get discounts and free pizzas!
When I bought my Supercard last year, the manager activated it immediately and I was able to use the 10% discount right when I got it. So it only cost me P269.1 instead of P299.
Jealous yet? Go forth and get your own!