Using your lowest figure, 300 hours comes to about 12 days 12 hours. That would mean that
activity_IMG.html 27.12:21:46
activity_(]o[).html 25.13:10:36
activity_[LN].html 19.21:38:01
activity_[USI].html 19.04:58:11
activity_SCRA.html 16.01:24:45
activity_OSI-.html 15.17:13:41
activity_[TAZ].html 14.05:42:28
Possibly using this model we could merge official factions into super-factions to survive. But you know how people like to argue over who gets the keys to the executive washroom...