I've only recently (November 2016) made my own mailing list, and I need subscribers... Or it would be rather pointless having a mailing list, wouldn't it? If you're worried about being spammed out, don't. As I won't. You'll probably get an email once a month, maybe twice if you're lucky. But I certainly won't be spamming you out.
Simply, enter your email address (required) and your first name and last name. You'll then be redirected to a page, asking saying it's sent you an email confirming you'd like to join the mailing list. Follow the instructions on the email and you're done! (you can unsubscribe at any time)