Hi all,
In WHMCS v8.9 we implemented the latest integration method from PayPal in a new module called "PayPal Payments".

This module enables merchants to make on-demand charges to client's PayPal accounts and credit cards on-demand and for any amount. Thereby solving the technical limitations of PayPal Subscriptions which have caused the pain points you've expressed in this request.

PayPal Payments is now the recommended module for PayPal, and you can seamlessly migrate from the previous PayPal Basic and PayPal modules over to it. For more information, see: https://docs.whmcs.com/payments/payment-gateway-modules/paypal-payments/