your conversion is about normal for blind google traffic - to convert at 1:50 or better, try sending your traffic to a site that will further qualify it, and allow them to chose where they want to go instead of forcing them.. the downside of this is you will get people exiting but jus spring some popups.
Try both ways see which convers better for your traffic and your sponsors..
oh yeah and tell ur traffic its gonna have to pay - that way they wont click if they are cheapskates and you can exit them to some free email signup sites or whateva.... cheap bastards.