Anonymous editing was enabled on mobile web on 30th March 2015 to all users (previous it was available in an experimental mode of the site). Now we have almost a month's worth of data I thought it would be a good time to check the impact... it's a little disappointing to be honest... but it depends what we are optimising and consider the most important.

Quick summary: * All edits up 154% * Edits from logged in users down 152% * Errors up 600% * No noticeable impact on the new active editor graph [0] (editors that hit 5 edits in the month period) * First edits by logged in users down 176% (although this could arguably be said to be compensated by anonymous edits) * New account creation up by 192%

Follow ups * Aaron H, it would be great if you could report back with some findings on the quality of the edits during this same period. * Can anyone provide theories why registrations jumped so much? This might be related to the change or because of something else

Details on the queries I ran: In March for a 26 day period before the change: * 170,948 total edits [1] * 169,845 non-anonymous edits [6] ** by 40,658 distinct users [7] * 26,617 users completely their first ever edit [11] * 9,528 errors [8] * 219,012 accounts created on mobile [12]

For a similar 26 day period in April * 263,986 total edits [2] * 136,079 non-anonymous edits [4] ** by 26,823 distinct users [5] * 15,109 users completely their first ever edit [10] * 58,394 errors [9] * 419,976 accounts created on mobile [13]

[0] http://mobile-reportcard.wmflabs.org/ [1] select count(*) from MobileWebEditing_8599025 where event_action = 'success' and timestamp > 20150301000000 and timestamp < 20150327000000 [2] select count(*) from MobileWebEditing_8599025 where event_action = 'success' and timestamp > 20150401000000 and timestamp < 20150427000000 [3] https://phabricator.wikimedia.org/T97494 [4] select count(*) from MobileWebEditing_8599025 where event_action = 'success' and timestamp > 20150401000000 and timestamp < 20150427000000 and event_username is NOT NULL [5] select count(distinct event_username) from MobileWebEditing_8599025 where event_action = 'success' and timestamp > 20150401000000 and timestamp < 20150427000000 and event_username is NOT NULL [6] select count(*) from MobileWebEditing_8599025 where event_action = 'success' and timestamp > 20150301000000 and timestamp < 20150327000000 and event_username is NOT NULL [7] select count(distinct event_username) from MobileWebEditing_8599025 where event_action = 'success' and timestamp > 20150301000000 and timestamp < 20150327000000 and event_username is NOT NULL [8] select count(*) from MobileWebEditing_8599025 where event_action = 'error' and timestamp > 20150301000000 and timestamp < 20150327000000 [9] select count(*) from MobileWebEditing_8599025 where event_action = 'error' and timestamp > 20150401000000 and timestamp < 20150427000000 [10] select count(*) from MobileWebEditing_8599025 where event_action = 'success' and timestamp > 20150401000000 and timestamp < 20150427000000 and event_userEditCount = 0 [11] select count(*) from MobileWebEditing_8599025 where event_action = 'success' and timestamp > 20150301000000 and timestamp < 20150327000000 and event_userEditCount = 0 [12] select count(*) from ServerSideAccountCreation_5487345 where event_displayMobile = 1 and timestamp > 20150301000000 and timestamp < 20150327000000 [13] select count(*) from ServerSideAccountCreation_5487345 where event_displayMobile = 1 and timestamp > 20150401000000 and timestamp < 20150427000000