Others have responded but I'll throw in another way to look at it. They aren't subscribing to an email list per se, the are signing up to get reminders when a c

Others have responded but I'll throw in another way to look at it. They aren't subscribing to an email list per se, the are signing up to get reminders when a content provider--that they are already interested in viewing the content from--releases said content. It's more of a notification via email than the email itself.