AFS Analytics displays 'Best Sites' or 'Top Sites' button on my site.
AFS Analytics can display different buttons on your website. You can choose the button design displayed (visible or invisible) in Editing your account.
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. This does not affect tracking or analytics reports. You can increase this limit by upgrading your account to silver plan.