His offence? His tweets being mainly links. John makes a good argument:
Dave is right to point out that this kind of behaviour runs directly counter to the spirit of the Internet — which is a technology that is entirely agnostic about the uses to which it is put. That’s a feature of the system, not a bug: it’s what was designed into the architecture of the network. It’s part of its DNA. If the guys who run Twitter want it to enjoy the same kind of organic growth as the Net and the Web had then they had better learn the same kind of agnosticism.
Hat tip: Charles Frith