I regularly get emails sent to me from websites that want free products to run as part of a "contest" or other promotion. We often do this kind of thing. But the first thing I do is make sure I'm on a computer that has Alexa toolbar installed and hop on over there.
The reason I do that is that Alexa's toolbar will actually display the numerical ranking of a given website. If it's ranked in the top 100,000 websites, it's very popular. So with it, I can quickly find out the relative ranking of a given website.
Now, spyware programs report this program as Spyware. That's because, technically, it is. The way it works is that it tells a master server what domains its millions of users have visited and that's how it compiles its rankings. But it's not Spyware in the negative sense, it's providing a valuable service to the net.
Give it a try for yourself. It has a serach bar in it too. It also displays related websites which is also very invaulable. So when I go to WinCustomize.com, it has links to Stardock, WindowBlinds, Deskmod, Skinbase, Deskmod, etc. all as part of the toolbar automatically because those are other sites that visitors here go to according to its user base.