Hello Barb,
The way it works is that we exchange clicks on the PTP links in our signatures. Most PTP programs have added GPF to their approved list so when you click one of the PTP links (in my signature for example

) you will see it credits just like they do when you click a banner at a PTR or surf at a TX. In the click exchange threads you would go into someones thread and click the PTPs in their signature and post in the thread so they know you did so and then when they come to their thread next they would click the PTPs in your signature in return. You can also start your own thread after you add your PTP links to your signature and people will visit your thread to exchange clicks with you.
Hope this helps