To persuade more Facebook followers to sign up for my newsletter, I have been posting a signup link https://roscoenews.com/#/portal/signup in Facebook posts. If they sign up using that link, is the source always tracked in Ghost analytics? If not, can I add a tracking code, such as “/portal/signup?source=Facebook”? I posted, “A local man arrested for bank robbery is not where you think he is. Subscribe to our daily newsletter and find out.” Between 11:30 pm and midnight, I got five new members, three without a source listed. The other two do say “Source: Facebook.”