Recently, we started moving gyms away from Stripe. The issue is, Chalk It Pro Payments powered by Stax is not supported outside of the United States currently. Though, moving outside of the USA is a top priority and hope that we're able to soon have all international gyms switched over to Chalk It Pro Payments.
We can't give an exact timeline on when that could happen, but we plan to support and grow each gym regardless of their payment interface.
Billing Pro user interface is for those on Chalk It Pro Payments.
The Stripe user interface is for those on Chalk It Pro Payments.
The user interfaces do vary a little based on what Stripe's API capabilities are versus the flexibility that is allowed with Chalk It Pro Payments.