I decided to try this out. It's now been over 5 minutes, and I'm starting to wonder if it's hand-driven or, with my more cynical hat on, simply a novel way to harvest email addresses.
If the former, fair enough, since it will provide a genuine service while assessing whether or not it's worth coding up properly and creating a business. Classic technique for assessing whether an idea has value.
If the latter, a hat tip for the inventiveness, although I'd be a little disappointed.
We'll see.