FWIW the very vast majority of our users are integrated with either Adyen, Braintree, or Stripe (all open-source plugins). I know of ~20 integrations with more

FWIW the very vast majority of our users are integrated with either Adyen, Braintree, or Stripe (all open-source plugins). I know of ~20 integrations with more advanced gateways/processors: these are closed-source plugins, but the overall community wouldn't benefit much from accessing them (e.g. it doesn't make sense for many companies to directly integrate with mastercard APIs).