Token Curated Registry was a very popular idea in crypto long time ago. like pre-2020

what happened to it? any successful examples? any reasons why there aren't any successful examples?

Seems like many crypto ideas hit PMF 5+ years after first tried

Polymarket vs Augur is a good comp

I believe TCRs will still hit PMF, just need the right team and form

What would be a good use case for the concept?

Hopefully someone smarter than me will figure it out!

Yelp is the classic example, but I could also see some unique implementations around freelance platforms