Cash Cards are a form of microtransaction available in Grand Theft Auto Online. Named after various types of sharks, and using the in-game "Shark" branding, each card offers a different level of in-game money (GTA$). Cash Cards are also advertised on the in-game radio, along with some types not available for purchase. New in-game cards are periodically added to GTA Online, usually after a batch of DLC releases. The in-game economy is balanced to sustain players who do and do not purchase cash cards. Purchase of the cards is optional.