Your card are always available and it can also be exchanged with real players e.g real P2P exchange cards. You can also use the card game in the game plan and also in competition that is created by many users.
From my last research about this game, II saw that Bitcoin now gives users a unique card that can be sent by placing them in a book and promoting the game.
It has been customized that players or users are able to play for free because the game does not include purchase strategies.
The main logic behind this game is the game card. However from the research I made, the difference is that users can convert the reward from the card into crypto with the P2P exchange process in the game. The game also has a mobile and PC version