Instead of triggering the sign-up lightbox form immediately (or after so many seconds), I wonder if an option could be added so that my lightbox form doesn't show until a user is about to exit the site? I already have other forms on my site for lead generation and they really should be the dominant action for a user. But, I would love to show the Emma sign-up lightbox as an option before they exit the site. The added flexibility would make this feature so much more useful. Thanks!