I work on the client-side javascript SDK for PayPal (documented at https://developer.paypal.com/docs/checkout/ https://developer.paypal.com/docs/checkout/). We

I work on the client-side javascript SDK for PayPal (documented at https://developer.paypal.com/docs/checkout/ https://developer.paypal.com/docs/checkout/). We took Michael's feedback from his original article at https://fman.io/blog/paypal-for-saas-99-problems/ https://fman.io/blog/paypal-for-saas-99-problems/ very seriously. We're not all of the way there yet; but if anyone has any remaining concerns about the integration, I'd be glad to take them onboard!