Mike Masnick from Techdirt defined CwF = Connect with Fans and RtB = Reason to Buy in a presentation about the business models of Trent Renzor and NIN (Nine Inch Nails).
He describe how the band’s fresh innovative ways to sell music are based on these two principles. According to Mike’s presentation the new forms that NIN connects with its fans: A website that allows communication to and from fans, free MP3 players, games and most recently free HD video from their concert.
These CwF and RtB actually lead to their alternative definitions: CwF = Compete with Free and RtB = Return to Business
Update (7/25/09): Reznor recently decided to delete his twitter account. Did he change is mind?