The Slashdot moderation system might work up to a point. In the end, subscribing to moderators you trust (instead of subscribing to killfiles like Mastodon and Twitter groups use) may be the only way to evaluate comments.
From section "Priming accuracy improves sharing":
"[...] sharing discernment (the difference in sharing intentions for true versus false headlines) was 2.0 times larger in the treatment relative to the control group in study 3, and 2.4 times larger in study 4. Furthermore, there was no evidence of a backfire effect, as the treatment effect was actually significantly larger for politically concordant headlines than for politically discordant headlines"
In other words, people who were primed to pay attention to accuracy were significantly less likely to share misinformation. Seems to me like an example of it working quite well.
It's besides the point anyway. Any mechanism that primes or prompts the sharer to be mindful of accuracy before sharing could help reduce sharing of misinformation, according to the results from the article.
Apologies if there is something about "nano-payment-funded distributed and syndicated moderation" that I'm not getting.