If there's one thing that webmaster's know, it's that all affiliate programs are not created equal. That just seems to be the way it is. You can give two similar programs the same exposure, have one pay off big time and the other produce little or no results. Sometimes, it actually makes me skeptical but before pointing any fingers, I generally take into account that one might just have a greater appeal or conversion rate then the other. To start making more money, I decrease exposure of the program that is not paying and increase the exposure of the program with higher conversions.
In any case, what I am interested in here is discussing affiliate programs that pay. Some are definately better then others. In my 15 years, I've made a lot of money with more then just a few programs and worked with even more, but before going too far into it, it'd like to stop here and let you put in your two cents. I am sure you have had different experiences with affiliate programs and found that programs that haven't paid out for me, might have paid out very well for you. What programs are working for you? What programs aren't?