A law firm was trying to extort Valve with 75k arbitration claims which would cost $3k per claim ($225mm total). As an alternative they offered to settle for $2.9k per claimant.
In the 5 years since the binding arbitration was introduced valve has had only 3 arbitration cases and won all three.
Summarized from the article.
Yea, it looks like the win rate for consumers in arbitration is less than 1%. I’m not sure what consumers win rate is in court but it must be better than that.