Deux offres sont déjà disponibles :
- Tipjoy voici le mode d'emploi détaillé
http://tipjoys2cents.blogspot.com/2009/04/tipjoy-api-idea-2-paid-protected.html
- Twitpub :
"Authors set their own subscription prices, but the floor is $0.99 a month, which is too high. Another snag: Although author payments are sent to PayPal accounts (handy), subscribers must pay by credit card via WorldPay, a payment processing system relatively unknown in the United States. "
TwitPub invents paid Twitter accounts
http://news.cnet.com/8301-17939_109-10220413-2.html