We should make 2 sections :

- New coin, for all the new announcement.
- Old coin, for the announcement that are older than 3 months for example.

The threads would be moved from one to another automatically based on their date.
Optionally we could have a third one named trash for thread without a new message in 1 month.

With that you could follow what is happening in the good old coin without being bothered with the new crap.
And that will leave some visibility to the new ones without being overwhelmed by all the discussion in the old ones.