Important
This plugin has now been bundled into Discourse core. See: https://meta.discourse.org/t/bundling-more-popular-plugins-with-discourse-core/373574
Discourse Subscriptions allows site owners to sell recurring and one-time purchase subscriptions that grant access to a group on a Discourse instance.
For more information, please see: https://meta.discourse.org/t/discourse-subscriptions-plugin/140818