A startup that has created a blog option that focuses on privacy and controlled sharing is adding 15,000 users daily, the San Francisco Chronicle reports. Posterous has seen its service grow to 3.9 million members, the report states, with the startup's private blogging spaces four times more active than its public ones. Founder Sachin Agarwal said, "We've really seen both our existing users and new users latch on to the idea of controlled sharing." The company has also polled 2,014 social network users, finding that most do not understand social network privacy controls and the majority "would share more online if they could better control who could see what they're sharing," the report states.
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