MobileYouth: Introduction: "Children don't know the rules we set for them; this is why they defy convention. SMS grew thanks to young people 'breaking the rules'. MMS was an attempt to increase per-message fees. Some real views from youth follow, highlighting social value of mobiles for youth (duh).
Lifetime value of a young mobile customer in the UK is $20,000. This decreases as they get older."
(Via Planet Mobile Web.)