How to Link to a URL that changes daily?

The info page for this plugin says:

Changing the signup page location every 24 hours

My question is: if the signup page changes, how can I link new customers to the correct page to begin the signup process?

The process to start a new blog was already so nonintuitive that I had to write a tutorial to explain the setup steps. So I need to be able to link directly to the page.