IANAL and also I’m a dumbass but from when I’ve participated in these things in the past (and therefore when I’ve read the fine print), by the time they’re soliciting claims they have already gone through the entire process of confirming that the lawsuit is valid and deciding how much the company owes as a settlement. So once it reaches this point, the amount the company pays is already known, and it’s just equally divided among all the people with standing who file a claim.
So yeah, file a claim, because that’s your money that you deserve because you have standing. But if you don’t file a claim, everyone who did will just get a slightly larger amount of money