Most research suggests that the major SNSs [Social Network Sites] integrate into the lives of members, with online Friends normally being known offline … and usage patterns reflecting offline activity rhythms … A study of US teenage MySpace members argued that the networks in MySpace did not form groups (or a community in the traditional sense) but should be thought of as ego-centred … This is supported by research [on] Facebook … The more specialist SNSs that seem to support online community formation … are much less successful than general SNSs like MySpace and Facebook.
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| — | Thelwall & Wilkinson, Public Dialogs in Social Network Sites: What is their Purpose? |