Thank you for your interest and concern! Moderators have access to this information, in the form of customizable graphs of the expected daily data (visitors, questions asked, answers supplied, etc.), provided we do not share details. We can use this, I presume, to respond generally to specific questions such as "is this site growing," "is site usage correlated with academic calendars," and so on, so consider asking such specific questions if you like.
In my opinion, site usage data tell us almost nothing about the GIS world, because how we are doing as a community depends on so many more variables than the popularity of GIS in general. If anything, it is most closely related to how well we are letting people know of our existence and potential usefulness. One thing we can do as individuals is to promulgate that information: tell your friends about us! Put links into social media, email messages, and Web pages you control. (The site tracks links if they include your user id and awards badges--Announcer, Booster, and Publicist--for such activity.) Please let us know of any other suggestions you might have for growing and improving our site.