Hello 
Usually, when I develop apps where sign-up is not mandatory to display screens, I use the method of checking if Logged In User - Email - does not equal blank.
That way you can direct users to the right screen without any kind of problem. So if the user - email - will be blank, clicking on the profile icon will send them to the sign-up. Conversely, if they are already registered and so user - email - is not equal to blank, send them to the profile screen.
This is the simplest solution I always use. Same logic applies to your ads, so if the user’s email is blank, show them, otherwise don’t.
Regards
Eugen