turboface,

On your site, it says that several hits may occur from one unique vistor.

In the present context, a visit generally occurs when a text file is loaded from your server (this includes.phpL files). A hit occurs when a file is loaded from your web server. Since loading a single web page can cause several files to load (e.g. images), several hits usually occur when a page is loaded.
Your site quotes "10,000 hits for $X". Does that mean actual unique vistors or does each vistor equal multiple hits?