A big one that I like is that I'm seeing a lot of groups filing lawsuits as Pro Se (without a lawyer). This gives them more power as they don't need to worry about trying not to piss off a judge for future favorable rulings. Even if you don't win, this costs them a lot of money and time to litigate your suit.

Or you may win and get cut a check.

There are also MANY opportunities to file bar grievances and judicial complaints against lawyers and judges when they don't do their jobs correctly (which as we know is most of the time). This hurts their insurance rates and promotional potential. Many of these groups have caused lawyers to retire and firms to shutdown and/or rebrand because their insurance premiums were raised too high or their insurance carrier dropped them altogether. This can be done simply as a court watcher.