No this scrollbar does not help you earn cash. I don’t think Google AdSense has figured out a way to put ads on the scrollbar yet. This RichScrollbar extension promises to deliver a more feature rich experience in your everyday browsing.
So what does it do?
This extension add to scrollbars some buttons to simplify common scrolling operations, actually only one button is present allowing scrolling to the top/bottom of the page. The button is present in main browser pages, text areas and list boxes.