Test demand with simulated payment or account creation pages.
PayFlow Insights is a free tool that lets you create simulated payment or account creation pages in seconds. It will ask you a few questions about and generate a secret key, a unique link, and some embeddable code you can use to display right on your landing page. You can use the unique link in any link just make sure to set "q" as a destination for the user after they go through the experience. You can use the secret key to retrieve how many people tried to buy or sign up and also see the email address of those who agreed to share their email.