is cj (commission junction ) is best to earn money...?

I personally do not like commission Junction. The do have a larger amount of products to promote than other networks. However, they tend to discontinue your account without telling you if you do not get any sells in a certain amount of time. They are notorious for trying to screw people out of their earnings with such little tactics. They recently were involved in a class action lawsuit for such practices. People whom sell allot through affiliate programs might like them better- as their practices seam to snub out the little guy. I have had better luck with Share-a-sale and linkshare. Good luck

It is my first time to hear that site also. I have absolutely no idea of it. Hopefully someone can give you some tips, and I can find out more about it too.