In my opinion there is no need for voting on usenet. You can reply to anyone or ignore anyone. No global echo chambers, no global moderation beyond removing illegal content on a specific provider or filtering a usenet group on a specific provider. If you had a group of like-minded friends that wanted to ignore specific ways of thinking, then you could all contribute to your own group specific ignore-list. Corporations have no financial incentive to build around usenet for this reason, as they have zero control over the client.