Multiple registration levels

I'm currently using CB Pro for creating profiles, auto-actions, etc on my website that uses Jevents for managing classes that users can sign up for online. I want to have multiple registration levels on my website. Level 1 will have limited access with just requiring name and email address on the registration form, Level 2 will have additional permissions and access and requires significantly more information. Neither will require a paid subscription. We may want additional levels later. User should be able to upgrade from one level to another by filling out the necessary information required. Do I need CBSubs, which seems overkill for me since there's no payment involved, or is there another way to do this?
Thank you!

Sounds like you just need Profile Types. Easiest way to do that is with CB Conditional or CBSubs, but since you don't need payments then CB Conditional should work nicely for this. First you'll need a field for users to select what type of profile they're creating. This can be a select field, radio field, etc.. Then you'd condition your other fields based off the that field and you're all set. Now during registration it'd show and hide fields based off that profile type field.