Users could use any client they choose, and clients can implement different features or offer third party services. Because we’re building on a decentralized protocol, client developers don’t have to ask permission from any central company, and they can build their product without fear that someday their API access could be revoked. Users don’t have to wait for twitter to add new anti-spam or anti-harassment features, they just use a client that offers them. An ecosystem of services grows on top of the open protocol, letting users do everything they can do with twitter today and more.