Actually, as a follow up here.. is there actually anything you can use the Internet for that doesn't require either you or a third party caring about the activity of another party? I suspect there is.
Weather, perhaps? Stuff like e-mail, most news, IM, chat, or whatever are ruled out though, even this very site.
I think his point relates to "say it for the sake of saying it" as opposed to "doing this for a reason." So, case in point, I come here to get in debates. I use Tumblr to store my ideas (I don't follow other users, and I've tried to disable the following count so I'm not influenced by my far-too-many followers). But for Twitter, I see it as "I'm here to talk for the sake of talking." I don't get it. As it is, now that my Twitter shows my Tumblr posts, I've been slowly picking up Twitter followers, and it baffles me. I follow people using RSS, and I've asked before to allow HN to give me a "new replies" RSS feed so I can centralize everything (and internally, versus on an open field like FriendFeed). I'm horrified at the thought of adding yet another outlet to post links and say random things - there're too many already.
It's a shame because I like how minimal Twitter is. It's zen in a way. I just don't see the point to having one and keeping it: one site is enough, and my poison is Tumblr.
You don't get much value out of Twitter if you just post for the sake of posting. It's like e-mail. If all you used it for was writing to a penpal, then there's limited value there. But.. most people have evolved beyond that.
My grandmother would never have seen the point of e-mail beyond sending "letters" to each other.. but we all know now it goes deeper than that.
People who don't see extended value in Twitter now are like my theoretical grandmother and her myopic view of e-mail.
Weather, perhaps? Stuff like e-mail, most news, IM, chat, or whatever are ruled out though, even this very site.