It sounds like an interesting idea, but I'm really apprehensive about entering an email immediately. Perhaps you could have a message saying you won't sell that info (or even better, a privacy policy). Also, it'd be cool if you explained what the user is getting before signing up.

Hey Thanks for reaching out. Answering your question there's no way we would ever consider that.Your email is used in order to create a profile for yourself. Nothing is being sold or given to 3rd parties etc.

And thank's for the feedback, will take on board.

Hi guys. Any feedback would be really appreciated, thanks!