This looks like an interesting premise, but it's super sketch web design to ask for an email address with absolutely no explanation of how your service works.
Even if I was totally willing to give my email address to you - I'd still really like more of an explanation on how your service works before I invest any time into using it.
You could probably get a lot more positive feedback on this service by adding an explanation on how it works at a high level and what I am to expect by using it.