GGPokers promotions such as Daily Cash races will now be paid in cash game dollars (C$). They work similarly to the tournament dollars and can be used to pay buy-ins in cash games. The main difference for grinders is that they cannot be instantly turned into real money: they must be used to play games first.
A-game and C-game are the terms in most common usage however. Although C-game can refer to strategic errors made during a session, the implication is usually that those strategic errors were caused by a bad mindset, not a general misunderstanding of correct strategy.