I agree with the commenter above me. I stopped at the sign up form because I couldn't tell if it was a paid or free service and had assumed I would start getting emails to upgrade as soon as I signed up. The "get started" copy used is a signal to me that I may be able to get started when I sign up but to "finish" I will have to pay. I think you'll get more sign ups if you're more explicit with your language that it is, in fact, free.
I hate that too. I wouldn't remove the free and put the current functionality behind a paywall, but I'd still want to leave open the possibility of new functionality as paid add-ons if I go that route (like premium themes as previously suggested). What kind of language might be able to support that without being deceitful or vague?
