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Continue to ChatQuery : I think the StackOverflow blog covers it quite well: Several lesser providers (Technorati, Vidoop, Mozilla Weave) went belly-up, leaving their users stranded with no way to authenticate. https://vmapp.org/query/79735/I-Think-The-StackOverflow-Blog-Covers-It-Quite-Well-Several-Lesser-Providers-Technorati-Vidoop-Mozilla-Weave-Went-Belly-Up-Leaving-Their-Users-Stranded-With-No-Way-To-Authenticate/