We use a combination of IP address tracking and cookie tracking to make sure you are credited correctly for each sale you generate.
Your unique link will set a cookie on the visitor's computer with your unique affiliate id built into it. At the same time, we record the visitor's IP address.
When the customer buys any template, we always look for affiliate id's. If one is found in the cookie, you will be credited for a successful sale.
If the IP address cannot be found, we then search through the list of IP addresses and the last person to refer the IP address to us will get the credit (most likely, you).
IP address tracking only records the last 24 hours of addresses whereas the cookie is set to 30 days. IP tracking is essentially a backup incase a cookie cannot be found.