I had a long post written out but it broke the 2000 character limit. Here is the TLDR version.
TLDR: Siteground hosting detail and sign up pages look like monthly renewals are possible. When it comes time to renew hosting, you can't do anything less than a yearly renewal without talking to a live chat agent.<p>Even then, without pushing back, you are required to do yearly renewals.<p>Here is the hosting detail page, the account sign up page, and the ToS page.<p>http://archive.is/6kevN http://archive.is/zog1A http://archive.is/BMj7k