I am thinking about trying some different marketing programs like Adwords and placing links on high traffic site or Adbrite. I know that I should have a good entry page, something that makes people continue to learn more about my service/product, and then make a sale. However I am wondering, does the URL matter? I want to test some products and Affiliates but don't want to buy a new domain everytime. Can I simply make a new page with an existing domain, say my blog and still get accurate results and CTRs etc?