Callisto Network is a blockchain platform with its own cryptocurrency (CLO) that is based on Ethereum protocol, so any Callisto improvements can be applied to Ethereum Classic. Callisto is NOT a testnet or a hardfork of Ethereum Classic. Callisto Network is developed by Ethereum Commonwealth, one of three ETC development teams.
Callisto is NOT a testnet or a hardfork of Ethereum Classic. This indicates that changes are made to the blockchain, or will be made in the future, different from the original.
This phrase says that Callisto did not keep the balance sheets of the holders of internal network tokens. Fork or hard fork changes the software, and balances are saved.