Maybe a little off topic: I see a lot of the benefits in using a Merchant of Record (MoR) and yet I really like using Paid Memberships Pro (PMP) for Wordpress.

Maybe a little off topic: I see a lot of the benefits in using a Merchant of Record (MoR) and yet I really like using Paid Memberships Pro (PMP) for Wordpress. Does anyone know of an MoR that might connect to Wordpress in a similar way to PMP? Or even how to hook up an MoR to function through PMP? Maybe just in general, an MoR that does membership sites well? Lastly, an MoR that does nonprofit sites?