Obviously I am posting this from a throw-away (also, hail qubes) and am obscuring a few facts. Over a decade ago I was part of a illicit forum where goods and services were sold, and both parties had mandatory escrow with optional arbitration. Over my runtime I have settled between 1 and 100.000 ( ;) ) arbitration cases, ranging from a few cents to well over $100k. For those who may think they know what operation this was ... you probably never heard about it. All I can say that it wasn't ransomware, and nothing porn or trafficking related.
The entire topic interested me so much that I went our IRL to take courses in settling disputes and handling arbitration. Based on that I established rules to arbitrate and settle disputes by. Rules for both parties to interact, prior to sale of service/product and during arbitration.
Some cases took minutes to hours to settle, others days or weeks, sometimes even months. Sometimes people get incredibly emotionally involved for a few dollars, sometimes disputes for well over what I earned in a year, where solved by both parties only giving (yes/no) answers to my questions and inquiries, for them to request deletion of their accounts after the dispute was settled. The contents being mostly obscured by encryption, but only my rules allowed their commerce to flow in the first place.
I was tempted often to step in and steal money, but something told me that sitting out the experience would be so much more valuable for my moral compass and the understanding of people. I am happy it went that way, it did teach me so much about people, disputes, conflicts and problems. Now when I face problems and difficult characters in life, its like I have a cheat code of handling the situation.
The other thing I did learn during my ... lets call it 'tenure' was that this type of trade and commerce brings out the darkest characters and the darkest in people. That's another topic on its own ... I am happy to see this get attention on HN. This sort of "justice" has been around since the early 00's, preceding most darknet markets. And somehow I keep being drawn to them ... well until I got scared of by the FEDS (who of course always were around, and sometimes did bust people during ongoing disputes) and then my tenure was over. Good luck to those still in the game.