Well, how many place has managed to get 200+ million bets in less than a year, Windice will be one of the first ever (not counting stake because they had 6 years of primedice worth of marketing).
There could be 50 people online, 100 people online, 200+ people online and it wouldn't matter, what type of bankroll those players have is the real question, people do not come to casinos and spend days and days every single day, they come here gamble for few hours, lose their money and go, casinos needs to keep finding new players plus try to make old players come back, hence the importance is not the live number but total bankroll gambled at that moment.
I wonder which casinos you are talking about that has no information about online users. The in our signature has this information as well, so why it should be hidden while there is nothing wrong with it. I have to agree that this number does not represent the actual active players who are playing with their money (deposit). The number of wagered amount on the site is indeed more important than the online user stats but it does not mean that it should be hidden.