Just did a little research on the issue. A CRC membership for my +1 and me is $450 or 60,000 miles once I turn PM, plus the $50 or 10,000 miles initiation fee. That's a value of .71 cents per mile, which is pretty low, but those miles aren't doing me a lot of good otherwise.

http://www.delta.com/traveling_check...fees/index.jsp