places to get the
DISCOUNT.CARD is a card that comes a "Promo.Code".
It´s a code that if you insert during your Online Reservation, you won´t need to pay R$5 in advance online using your international credit card.
You do not need a DISCOUNT .CARD if you use your credit card to pay R$5 in advance - necessary to finish your Online Reservation.
The DISCOUNT.CARD is perfect if you don´t want to use a credit card to book in advance - because to book online in advance, it´s necessary to pay R$5 in advance.
These places sell the DISCOUNT.CARD for R$5 - the same if you book online using your credit card.