Is it possible to use the subscription plugin to limit creating topics in a category to subscribers?

[Moin]

Yes. The subscription plugin adds users to a group

@Discourse

The user is also automatically added to a group of your choosing so that you can easily see which users have subscribed as well as provide gated content in categories only that group can see.

You can use that group in the category security permission allowing only members of the group to create posts, but also other groups to read and reply

Understanding groups and category permissions

This guide explains how to manage category visibility and user permissions using groups in Discourse. Required user level: Administrator Groups and category permissions are crucial for managing access and content creation within your Discourse community. This guide will help you understand how to use these features effectively. Summary Category permissions control visibility and user actions Permissions are managed through group access lists Different perm…