So while there's a financial want from the lawyers' perspective, why would I want to go that route?
If Mr. Burns is dumping his chemical waste into Lake Springfield and you're winding up with little three-eyed fish as a result, you're hoping to force Mr. Burns to stop polluting the lake.
Are there sleazy class action attorneys? Absolutely. They can be found on late night television, ugly billboards with creepy mugshots, and stalking ambulance drivers (:D). Basically, anywhere your regular run-of-the-mill scheister attorneys can be found. But they're also fewer in number, mainly because class action litigation is significantly more resource-intensive than other types of litigation. And since class action attorneys are almost always working on a contingency basis, there's a lot to support the idea that they earn their fees here.
It might not seem fair when you're looking at a $2.50 check, but that's the tradeoff you accept in order to bolster your ability to force a change.
Sounds like a lot of other scams.