I started advertising on Bing redeeming their coupons. I had great success with yahoo-bing network. I had spend nearly 500 USD . It is an e-book. The email and landing page is hosted by getresponse. I got nearly 1100 visitors with 163 signups and 8 sales of 47 USD each. Then I started google adwords. But the result was aweful and totally shocking. 125 USD >88 VISITORS 1 SIGNUP and 0 sale. Any Idea about it.