Sally - I would like to know the answer to this as well. I made 3-4 purchases off Ebay and never received Cashback for them. In total, it was way over $100. I only emailed about the first one that didn't show up and never heard a response. That was sometime in the early Summer of 2009. It never showed up on my cashback history either. I didn't bother to follow up after reading the frustrations of people waiting months on end for their compensation which never really happened.
Do we have to send a ticket to the Cashback system for each order to receive compensation or are all transactions tracked?