The problem is that the box asking you to enter your email is the most prominent feature on the page before you scroll, which is reminiscent of those sites that try to get you to sign up for their newsletter before you can read the article.
Personally I'd be annoyed having to enter my email to check out a demo; I don't want to receive emails about something until I have a better idea whether it would be useful.
You can create an account and set everything up without ever talking to us if you prefer (that's the "Create a free account" link above the fold, https://app.xkit.co/sign-up).
Personally I'd be annoyed having to enter my email to check out a demo; I don't want to receive emails about something until I have a better idea whether it would be useful.