I hope the lawyers are also paid with in-game currency.

Or exposure

A disincentive to continuing the activity the class action suit was brought for.

In theory, class action lawsuits are either or both 1) compensate victims 2) "force" company to stop activity society deems "bad"

Victims care about #1, the rest of us want #2 so we don't become victims in the future.

In this case, stop exploiting addiction and other human psychology for profit via loot boxes.

The point of the settlement is to hit a company hard enough so they stop before doing something like this again.

Using in game currency and not real money is absolutely not going to achieve this.

No, that would be the purpose of a judgement. This isn't a judgement, it's a settlement. To Epic, the purpose is to make this go away. To those suing, the point is take a small but guaranteed windfall rather than risk a lengthy and uncertain court process.