We haven't really thought of the christian iconography like that and you are the first one mentioning it. I can really see your take of it and it would have been better to use a non religious symbol, I agree.
I don´t agree that you get "nothing" when signing up. You get a free account that you can use totally free to send, track and sign documents (not only during trial but also afterwards). But maybe that isn't that clear. Maybe the signup rate would increase if you just sign up with a username instead of e-mail. I will absolutely take your feedback in consideration future changes.
To put it another way, the problem I am trying to solve has never been that I don't get enough email from you. When the coin is my email, it's an indication that our interests are misaligned.
Regarding the video, one negative metaphor is enough to set the stage...either head banging or the death valley of deals. Is the protagonist me or my deals?
Again, good luck.
Elsewhere, the claim of experience in sales is weakened by the absence of specific named individuals with sales experience in the "who we are" portion of the site.
Finally, my pet peeve: Not providing anything in exchange for giving a company push access to my inbox. I have to be desperate before I'm providing anything other than a bitbucket to a landing page that hasn't provided me with direct evidence of value [e.g. something to play with].
As a metric, email signups seem pretty weak compared to actual engagement with the product...people who bother to land on your page are pure gold. Each one of them who goes away without using your product is a deal that winds up in the valley of death. Make the call to action, "Please try our product" not "Please give us a chance to spam your inbox."
Overall, I think there's a market particularly for small business.
Good luck.