Here is my worst experience : Between 2001 and 2005 I joined quite a number of Affiliate Programs at the and the number of programs that were performing somewhat were around 50 or so. Here is where the challenge was with each - I couldn't collect a dime due to the high minimum threshhold that was in place for each of these programs at the time. Anyone remembers "Sign up today and we credit your account $25" ? and in some cases $50 offer to sign up and I think there was one among the lot with a $100 sign up bonus. The problem was at the time that no matter how I tried I couldn't make the $300 minimum commision I need to earn to get paid from these programs. Google Adsense at the time was the lowest of the lot with a $100 payment threshhold. The point is I was running out of money to continue promoting these programs as most of the traffic in the day was generated mainly from Overture.com along with Yahoo Search Marketing and boy I tell you traffic generating was expensive just to set a campaign as most PPC services at the time were charging an upfront fee of at least $97 to get your campaign going. In the end I lost out on around Six to Seven Grand worth of Affiliate commissions at the time and some of the programs went with the times and I never collected a dime. What was your worst experience with Affiliate programs do you think it was as bad as mine?