On Sunday, Gartner's Lydia Leong posted an excellent backgrounder on how the internet industry came to have mostly common acceptable use policies, the contractually-embedded standards that apply as far as allowed content and practices. Timely for those wondering how some "up-and-coming" new social media platform would actually end up getting asked to take their business elsewhere (and why other providers might not be champing at the bit to provide that new connectivity). Truth be told, politics probably doesn't enter into it as much as you might think.
It might also help to explain to email marketers why deliverability and compliance people do what they do -- where policy often comes from and why it matters, from the practical perspective.
H/T: Derek Harding