Place outdated pinned threads in a new subforum

[Avalanche]

There's a lot of outdated pinned threads. They devalue the importance of the other currently pinned, up to date threads.

I propose we create a new subforum inside Site & Forum Feedback. This means nothing is being deleted or invis'd so they can all be re-pinned should they deserve it.

Here's a list of threads that are no longer needed: https://discoverygc.com/forums/showthrea...tid=174187

[Foxglove]

I unpinned the ones I found were deserving, as mods cannot create new subforums and I don't think this necessarily needs to all be moved into its own subforum. I kept the shetposting thread, though. It perfectly embodies flood.

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[Avalanche]

Nice work Foxglove. Appreciate it