Before hiding the demo button: How many users who tried the demo created an account? After hiding the demo button: How many users who created an account still

Before hiding the demo button: How many users who tried the demo created an account? After hiding the demo button: How many users who created an account still use the service a week later? Your signups might have quadrupled, but did the number of active users quadruple, or do you now just have a bunch of dead accounts?