I do know.

Gold cards can be used to either attempt to fill the deck, which will give you a share in $52,000! The last time they ended this 2 people had a full deck, splitting the $52k between them.


Or....

You can redeem them i the daily tournaments/lottery.

Each day cake will either offer you a reward for redeeming a certain card or number or cards, a cash prize, or tourney entry usually. Or you can buy into a tournament with the card they are looking for on that that day. Sometimes it will be 1 card, sometimes several of the same (it depends how commong they are, some are very common, some are not) Each tournament will have a different prize pool or tickets to a live event or something..


Hope this helps