I am very sure that I've make a sales as I were pitching some people through email and recommend them a Clickbank Product. They said they've bought it and talk about the topic like they really bought it. But when I check my Clickbank analytics, there's no sales to the product that I've recommended them. The sales have been made about 3 days ago and the buyers are happy about it so I don't think a refund occur. Even so there's a refund, it should appear in the analytics as well. When this happen I feel so sad that my effort is wasted.