That sounds a lot like Augur.
I think it’s a bad idea.
Why would you need a DAO-y thing to have a high-signal relay?
Why would anyone trust some random people voting on “high signal notes”?
Much easier to just filter by PoW. If you think your note is worth it, spend a lot of resources to publish it.
Otherwise just have on or more editorial staff pick what they lack — or buy a newspaper.