While taking in consideration what Danny said above, blockchain.info should allow you to control your wallet (or so they claim) which means you can export your private keys, import them somewhere else and use BCC If you want to
Which is why it is a
WALLET. They provide software that gives you exclusive access to your private keys. You can do whatever you want with the bitcoins you receive, and you are responsible for keeping the private keys secure. You can decide how you want to manage BCC, BTC, or any other fork.
while that's not the case for Coinbase, so you can't really claim the 'free' BCC.
Which is why it is just an
ACCOUNT. You don't actually have any bitcoins if you are using a Coinbase account. You GIVE all your bitcoins to Coinbase. Then they add an entry into a database in their system indicating that they they will send an equivalent amount of THEIR bitcoins wherever you ask them to whenever you ask them to. It is up to you to decide if you trust that they will honor that promise. Since the bitcoins belong to Coinbase, they get to decide how they want to manage BCC, BTC, or any other fork.
If you don't have exclusive access to the private keys, then you don't have any bitcoins.