On for my business, really don't care about it though despite having tried to get more involved a few times. I glance at it periodically but hardly ever contribute unless I release a new feature or retweet something. Prefer Google+ despite the low volume, because its got a higher signal-to-noise ratio, longer-form responses and it has many killer tech and marketing participants on it. Facebook for real-life friends, Google+ for my public profile, Twitter for scanning a wider set of people. Wait, there is one use for Twitter. When something moves in the market and I want to get quick info, I do a search on e.g. "Greece". Things are usually reported there much faster than articles. I don't have me a nice Bloomberg, so this is a cheap substitute.
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