|2013-06-07||Twitter API was acting faulty for couple of days. The activity in Wed Jun 5th and Thu Jun 6th was affected by this behaviour. This week's (week 23) active numbers will also be affected by this error and the number of actives per day and per week will not reflect reality. Twitter has now resolved the problem.|
Active tweeps have tweeted at least once in a week. Daily average is the average amount of daily active tweeps in that week. Some weekdays are more active than others, but this average gives the general direction of the daily engagement.