I recently canceled one of my phones, and GoDaddy tried to reach me. When they couldn't they sent me an email.
I thought this was simple, clever way to get channels to work together. For how simple it was, I'm surprised I haven't seen more people do it.
A member of our Outbound Support Team recently called to thank you for doing business with GoDaddy.com, Inc. and to either advise you of an opportunity to save money on products you already have in your account, or because you have a product that is expiring soon. Unfortunately, the phone number we called appears to be incorrect.
For a related tactic, see my earlier post on pop-ups for dead emails.