I am an ex-customer of Linode and I'm still worried about this incident - Do they still store your card after you've quit the service? This is terrible :(
Credit card information continues to be stored in our database in an encrypted format, and the decryption key is not stored electronically. We are working on a process on remove the credit card details of past customers on request and can handle this for you soon if you would like. If you have any further questions or concerns please let us know.
(It appears the answer is no, but given they haven't been forthright in the actual details of the hack, possibly not)