MemberPress does nothing with the gateway `create-subscriptions` capability about memberpress

[rvdsteege]

Posted by @remcotolsma in pronamic/wp-pronamic-pay-memberpress#12 (comment):

I think this is MemberPress territory and we have the next MemberPress issue open for that (not yet reported to MemberPress itself as far as I know):

#2

What exactly do we want to report / expect if create-subscriptions is not supported by a payment gateway?

Draft support message

Hi,

We noticed you're setting the create-subscriptions capability in all payment gateways, however this capability seems not be used anywhere. What is it used for?

Background: a user of our Pronamic Pay plugin asked us to add support for a specific payment method. The payment method does not support recurring payments, so we don't set the create-subscriptions capability. However, the method can still be used for recurring memberships now, which results in a gateway error.

Best regards,
Pronamic