For those wondering what the "Not Secure" means preceding the web address in the browser window:
Sites starting https are secure(sites you see a little padlock next to the URL), those without a SSL certificate (http) are deemed not.
It makes the site more secure and encrypts information so hackers can't steal credit card details if purchasing. The only threat to a site like this is stealing passwords or email address, but I am sure they have better things to do than attack DATM for a few passwords and email addresses. Google wants all sites to switch and hence why sites that don't have the certificate come up with a warning.