CAG utility token and equity-like CNG token are quite different in their nature. That is why both of these tokens exist after the token swap.
CAG is a prepayment token and the swap was just one of the utility cases as a payment method for the CNG token. All CAG holders that didn’t choose to swap to CNG can still use CAG tokens to pay for the services offered by Change. Currently you can order our payment card with a discount using your CAG. Additional use cases for the CAG token are planned to be added in the future. CAG tokens will also remain trading on the respective exchanges.