Hello @marcoqwerty
PB and PMS work well together.
You don’t need two separate registrations shortcode.
You can use the PB registration form and add the PMS field there, as described here:
https://www.cozmoslabs.com/docs/paid-member-subscriptions/integration-with-other-plugins/profile-builder/
But there is indeed one use-case where you might want to also have the PMS registration shortcode somewhere: for already logged in users to be able to subscribe.
If you somehow have already registered users and they need to subscribe, they can log in, then visit the PMS registration shortcode and they can subscribe from there:
https://www.cozmoslabs.com/docs/paid-member-subscriptions/shortcodes/#Allow_logged_in_users_to_become_Members
With best of regards,
Gabriel
