AFS Analytics can display an invisible button on your website pages. To enable this option, you have to select the option 'invisible button' in the field 'Button displayed on your website' into the 'Edit site info' form. Here is a help video that covers this feature.
The Invisible button is limited to the first 50,000 page views per month. Once the limit is reached, a small AFS logo will be displayed on your website pages. This does not affect tracking or analytics reports. You can increase this limit by upgrading your account to silver or gold plans.Main menu->Account->Edit site info.