Functionality of 'Site Use Confirmation and Deletion' in Sharepoint

This feature works the same way as SPS 2003 / WSS V2.  When you configure this through Central admin site-->App Management-->Site Use Confirmation and Deletion with a number of days and some number of notices, Sharepoint will only wait for those number of days and will start sending the notices.  It is not actually checking whether the site is being used or not.  Once it reaches the number of days, SharePoint will send an email to the site owner to check whether the site is being used or not.  If the owner clicks on the link and ensures that the site is in use, then the count will reset to the value which was actually set when we configured the Site use confirmation and deletion.  CertificationDate and DeadWebNotifyCount are the two fields in the Sites table of the content database where the information is stored.  Please keep in mind that modifying the sharepoint databases are not supported