Mailing the story:
Firefox Soars and Apple's Safari Jumps as 2005 Browser Share Race ...
"NetApplications, ... measure, monitor and market Web sites for Small to Medium Enterprises (SME)"
[ED: Meaning they measure a fraction of the total market and of that fraction - what portion they have as clients that are measured? How random is its subset or how typical are its clients are unaddressed issues, hence, these are near meaningless numbers to advertise themselves without the slightest nod towards statistical error. If you believe these figures, we need to talk business (I really have a sure money making proposition for you on the East Coast ...)- HC]
Regarding marketing see the lower portion of this article: "HitsLink(tm) is NetApplications' flagship product, providing advanced website statistics and analysis for webmasters and eMarketers alike."