I have a few clickbank products and also promote many clickbank products. I have a membership site. I promote amazon products, ebay, and a few other affiliate programs. Online gambling is not my main niche. I only have one gambling website but I do OK with it.
Now, I’m experimenting with forex, fashion, finance and education but so far, the results are disappointing. Particularly in forex and fashion. (conversion is so bad… it’s suspicious of shaving)
I get great results with forex. Make sure the product is good and your traffic is properly targeted. People in Forex are always willing to give up a few hundred bucks for a system that will give them an edge. Also EA’s sell great. I was actually thinking about programming some custom EA’s myself and selling them. Set up a site with some camtasia videos showing the EA in action and charging $500 or so.