The ptp script is set to autosuspend the ptp if the member has less than 40% valid clicks and/or more than 40% proxy hits. So be sure to check your stats often. If you promote your ptp link at an excessive number of sites, there is more likelihood that you will get more invalids, because members belong to many sites and may click your link more than once per 24 hours.
If you find your ptp suspended, contact me through the site contact link and I will unsuspend it. You may need to adjust your advertising.