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This isn't a feature of Formidable Forms. Permissions and role based accessibility is relatively limited.
It's a bit more complicated than can be discussed here, but you could create register user form and then create some user meta for the role type "basic" and "featured" and then use those as filters in your view.
It will take some research and effort. You can use this reference to help you understand how to do such a thing, but it isn't spelled out. You may need a third-party developer to assist you.
https://formidableforms.com/knowledgebase/user-registration/
You might also use stripe or paypal add-ins to collect payments and such.
You can try and do it all manually with some sort of user role plugin that limits visibility of pages based on role as well, but again, research and effort are required, and it isn't always spelled out.