1. If the offer is too good to be true. That is the money for nothing scam were you are told that you do not need any technical skills of knowledge to succeed.
2. Lack of support and contact. If you cannot contact their support team or company selling the product.
3. Get rich quick promises. Promises of hundreds or thousands of money by end of day or a week.
4. No money back guarantee.
5. Constant upsells before you get to the page with the product.
In order to choose a good affiliate product, I usually go for products that first offer a free trial. I also ask for product and product owner reviews on forums or search google. It is also important to find out if there are any top marketers selling the product... I hope these few tips can help someone from being conned the next time they a seeking to join or buy an affiliate product. Any other tips?