Let me beat on this horse a lil more, the numbers that you have shown us are interesting and compelling. However without a "control" (a model of the norm) from other relevant websites, they are almost meaningless.
Now post something really interesting..............pics of the bikes you are...
Advertisers are interested in visits not just post count. There are numbers likes length of time each user is logged in. How many threads are visited and how many clicks on advertising links.
These numbers are good indicators of the health of the site. It is obvious that it is much busier now...