Lawyer fees depend in how far it goes in litigation.
The ‘Class’ gets a few bucks if they can show damages or are names (ie the massive lists of shadowbanned). It splits by the number in the class (usually very broad). Class representatives get more, there are fewer of those.
In CA law, there are more lenient classes and damages types (punitive etc.), but…
Changing the behavior is the goal. That definitely happens.
It costs nothing to be in the class, it costs a little time to be a class rep. They take some time 2-3 years, but behavior is checked fast - at first notice usually.