I think the portion of the policy that you're referring to is information that's received in connection with advertising. In that case, we say we receive information in connection with advertising, and then we delete it when we no longer need it. That is a general policy that applies regardless of whether you delete your account.
When you delete your account on Facebook, then we will remove any personal identifiers from data that we've collected or deleted so that you're not identified by any information we have.