Can someone help me with clickbank ?

Is it worth it to promote products on ClickBank ? how much money can i earn from them ? does anyone have proof ?

A small percentage of the 100,000+ Clickbank affiliates do well, don't expect to make money spamming site with affiliate links, you need to have your own site that gets lots of traffic or to be very skilled at using paid advertising. It really takes a professional business like approach to make a profit.
You almost always earn 50% or more of the sale price, they do have fairly high return rate, their method to limit buying through your own affiliate link to save 50% is to not pay you until you get sales through like 5 different payment systems.

You certainly would want to invest in some tutorials if you pursue it (some recent pubications).
Free teaser:
www.warriorforum.com/warrior-specia...
www.warriorforum.com/warrior-specia...
www.warriorforum.com/warrior-specia...