A lot of time has passed since the opening post, and for me Twitter has lost its spark. I have been on it just short of 11 years and I just don't think it can provide the traction required to drive business any more. I have no doubt it does for the likes of Jeff Bullas with 500,000 followers and 500 pieces of content, but that's a business model that can be, and is, automated. The notion that a small business can start out on Twitter and build a large audience and drive business is so labour-intensive that it would be counter-productive
I still find it useful for following relevant topics, and for a media company, event, or celebrity, I think it can work. For everyone else, it's a luxury they can probably do without.