3) Fewer games could add a significant amount of time. For example, 8 minute games with 2 minutes for change-overs = 12 minutes an hour. That could be 3-4 hours over a weekend more polo (or, 18-24 fewer 3x3 games in a regular tourney vs 6+ more BM games in a BM tourney).
Clement's got it. In addition:
3) Fewer games could add a significant amount of time. For example, 8 minute games with 2 minutes for change-overs = 12 minutes an hour. That could be 3-4 hours over a weekend more polo (or, 18-24 fewer 3x3 games in a regular tourney vs 6+ more BM games in a BM tourney).