You can’t just “open an issue” if you don’t have a Microsoft GitHub account or live in a region under US sanctions or censorship where you can’t get access to it. These are pillars of sand to build your community on that not only lack freedom for users, but access too & control for your own content + moderation.
Gateways don’t need to be the only answer too—even just mentioning an unofficial space lets those that don’t want their data harvest can hang out together under the same topic but away from those service (even if most of the chat log is public, unencrypted anyhow).
Developers of all folks should know better & know the issues caused by proprietary services. They should not plan for where users are now but where they want things no be in the future but there’s a myopic view of this is where the users are. They don’t even give folks a place to air grievances like you are suggesting.
Since casts are just RSS, Newsboat can be used