Did I Do It Wrong?

A couple years ago I tried AM. It was for some kind of...miracle exercise regime, the program itself was solid and it converted extremely well for EVERYONE else but anyway, I got my ref link which lead to the sales page with such a great conversion rate, wrote some google ads (good ones) made my keyword list (this took me 3 hours...between research and whatnot) I ended up paying about 2 cents a click...problem is, i got over 10,000 clicks in 2 days, cleaned out my account, not a single sale...not even an opt-in (paid a buck each for opt-ins)! Not that I really wanna get back into the saturated market but, I can't help but wonder what could I have done better?