Few months ago I launched my start-up's temporary promo page.

Could you please kindly review it and let me know if any comments/suggestions.

What I am particularly concerned about is how people read "Stay tuned and get rewarded" button with FB's symbol. Is it clear that this simply means "Subscribe and get notified about the launch (and be rewarded)" or the language is too puzzling? Does lack of content/explanation prevents people from pushing the button (we can't disclose more info about the product for confidentiality reasons at this stage, unfortunately). I am asking because the conversion ratio (visitors>subscribers) is far from our initial target.

Many thanks in advance for help.