It should change at the beginning of each day (server time) and as the max # online during that day increases.
100 online @ 1am on 3/2/12 = 100 max online today
400 online @ 8am on 3/2/12 = 400 max online today
800 online @ 6pm on 3/2/12 = 800 max online today
600 online @ 8pm on 3/2/12 = 800 max online today
150 online @ 1am on 3/3/12 = 150 max online today
Yes, I thought so . What is weird is it went the other way during the day. Meaning 900, 495 ? Not 495, 900 .
If you're in the US, server time is probably about "opposite" of what yours is. IIRC, server is hosted either in Hong Kong or Japan. Fwiw.
ETA: inb4 European "haha American is so ignorent and self-centered for think that US is where all servers is"