In SamCart, I have the ability to create a product that has an initial payment of $x, and then it transitions into a monthly recurring payment after x days.

I want to be able to create flexible pricing plans and promos that combine bundles of SaaS plus coaching offers.

Attached screenshots are a sample of what I can do in SamCart for both Stripe and PayPal.

The problem is, I can't enable rebilling for SaaS if I used an external payment provider for the payment.