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Shog9: 294,542 users active (post/vote) on SO during the past 30 days. 6,845 of them active on MSO. So, a hair over 2%
Note: "30 days" being April 12 to May 11
Shog9: 4515 10K users active (post/vote) on SO during the past 30 days, 1090 of them active on MSO
hichris123: @Shog9 How ...