> but doesn't effectively enforce that rule. We don't know how effective their enforcement of the rules are. Maybe 99.9% of listings for banned items are prope

> but doesn't effectively enforce that rule. We don't know how effective their enforcement of the rules are. Maybe 99.9% of listings for banned items are properly removed and what we see are just 0.1% of a very large number. I would say 99.9% is a rate that most people would say is effective. Would you say the rule enforcement is effective if it catches exactly 100% of violators?