Just came across this comprehensive report and summary of some Twitter statistics. Check out the following stat:150 followers is the magic number. In a particularly interesting data point from the survey, Sysomos found that Twitter users tended to "follow back" all their followers up until about 150 connections. Then the reciprocation rate fell off dramatically, which seems to indicate that this number may be the crossover point where people shift from using Twitter for more personal use to using it more for "lifecasting" their thoughts and actions to a community of people who they feel varying levels of connection to.
What's interesting is not the statistic itself but what it tells us about community. Dunbar's number, the theoretical limit to the number of people with whom one can maintain stable social relationships, is also set at 150. Pastors and church-planters often talk about the '200 ceiling', a typical peak in church attendance.
How could these numbers inform us about authentic and sustainable community?
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