We’re confused about this!
S21m offers 2 ways to generate a shortcode for say, a 1-year membership : either using the “PayPla Pro BUY NOW” code OR - the PayPal Pro “SUBSCRIPTION” (non-recurring!) code…
The difference is that the “rr” directive is either “BN” in the case of buy now or, “0” in the case of a non-recurring subscription. Is there any difference in either the way this gets process or the user experience?