The concept behind Visitors.ws is very simple:

1. You put a small Visitors.ws HTML code into your web site pages.

2. When a visitor leaves your web site, a new window loads in the background with one of web sites from Visitors.ws network.

3. You earn up to 1 credit when a unique visitor invokes a new window by leaving your web site.

4. For each earned credit you get 1 unique visitor to your web site.

You can see Visitors.ws in action on this page.