Ok I've thought through my last post above some more and I think I'm onto why for large groups looting on one item (like 24 for ST minion) there's often a person delaying the roll. I thought before they were just trying to troll people into giving up and leaving. Now I think they just want to be the last to roll. If 23 people have rolled on something, and you're number 24...and you can't roll the same number as anyone else... there's currently one roll that's the winning one of the group, and twenty-two losing rolls which are no longer possible for you to get. Could be the highest number already drawn is a 99 and winning is impossible, or could be it's only 85 and yet you roll a 12 and lose anyway. But I'm thinking the person who rolls last has improved odds over whoever rolls first, and that's easier to see when you consider a situation where 24 vs 8 people roll on something.