[Retric]

There is a large difference between suing 100 people and 100,000+ people. Feel free to come up with a successful single suit with more than 50,000 defendants. In then end mass lawsuits are really related suits where each defendant get's to defend themselves individually.

PS: It's a question of overhead, there are some downloading lawsuits with large numbers of defendants but they tend to be worth ~3k / person and are settled individually. With a max payout < 10$ it’s just not worth it.