Yes, to uninstall the plugin, you’d need to remove it from your app.yml file then rebuild the app. At that point the site is running, but the plugin is no longer installed/available.
If the site were offline, sure, the plugin wouldn’t be running but then neither would the site. Is that what you’re trying to accomplish?
While subscriptions are maintained in Stripe, a benefit of the plugin is that subscribers are added/removed from Discourse groups automatically based on their subscription status. You could do that manually if you want, but the plugin makes it far easier to manage.
Thanks for this. We’ll keep that in mind for future feature development.