It loads quickly and looks really clean. I do have one suggestion...
Even in mobile, I like to see a little bit of product exposed without a click -- could be recent updates, most popular celebs, etc. Showing a little bit (while keeping load times in mind) might give you a better bounce rate.
Also, it doesn't say that this is a free join until you click the sign-up button. If it's a free join, why not mention it on the main page?
