Almost certainly every active swap should have its own Announcement thread. Everyone in the swap would be expected to "Watch" it.
But any given swap will probably tend to spawn many threads, perhaps so many it becomes hard to find them all.
Should "swap chat" threads be allowed in the "Group Seed Swap Forum"? That might become very crowded over time. It's valuable to keep related threads together, but it's also valuable to be able to find a thread easily without wading through hundreds of active but irrelevant threads.
Might there be one forum for "technical" swap discussions, announcements, and planning new swaps?
Plus a different forum to support specific active swaps and the chat threads they spawn?
Or might it be possible to apply a filter to all threads in the Group Seed Swap Forum, so you could show "only threads for the XYZ Swap"? Like the "show active threads only" filter.
Once there are recurring swaps, there might be an option for "show ALL XYZ Swap threads" as well as "show only threads related to the CURRENTLY ACTIVE instance of the recurring XYZ Swap".
Or at least an ability for the Host to mark threads "Closed" for a swap that is over, so we can hide all threads for non-active swaps (even if the thread still has a lot of ongoing post-swap-chat).
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I think the following is a crazy idea, but Dave can judge that better than me. I was looking for ways to keep the "Group Seed Swap Forum" uncluttered after dozens of swaps and hundreds or thousands of active threads.
Suppose, shortly before each swap goes active, Dave created a temporary mini-forum for just that swap. The mini-forum might be locked when the swap was over, if it was a one-time-swap. If it was a recurring swap, the mini-forum might be allowed to stay active between repetitions of the swap.
The downside is the "Cubits phenomenon", where too many forums dilute the traffic until each forum is almost empty.
The upside is that once you find your swap, every thread for that swap is right in one place and easy to find, even years later.