Traffic data is a great way to take the temperature of your website and marketing initiatives. When you are writing and promoting blog content on a regular basis, you can use traffic data to track results and correlate these efforts to actual ROI. Be sure to look at website traffic numbers over long-term intervals to see trends and report on improvement over time.
Unscrupulous affiliates can squat on domain names with misspellings and get a commission for the redirect. They can populate online registration forms with fake or stolen information, and they can purchase AdWords on search terms the company already ranks high on, and so on. Even if the terms and conditions are clear, an affiliate marketing program requires that someone monitor affiliates and enforce rules.