I would at least add a demo video or something to show how the product works. I had the same experience and was confused why the demo would require me to signup. At best, it came off as poor UX, at worst, a bit sleazy.

At any rate, it's an interesting idea. I would like to see a demo without having to signup for something.

My suggestion would be to simply tell people that the internet's hug has overloaded the servers, offer an apology, and let them know that you hope they will come back later.

The problem is that asking for email suggests people should trust the website at a time when there is no basis for trust and many people have substantial experience to suggest not trusting.