As plaintiff’s attorneys, we take cases we believe in, we spend our money to prosecute the case (I almost always pay that $200 AAA filing fee for my clients), and then we get paid out on the back end. In my personal opinion, it’s a much more appropriate compensation method, because it puts our interests firmly in line.
Based on the very limited understanding I have of this case, if we settle, I’m targeting a 10k settlement and taking a percentage of that (a percentage smaller than the client), and so my client is getting 5k+.
The disadvantage of it is that if you're just some guy against a BigCo, then instead of risking having to pay your own $50k lawyer bill you're potentially risking having to pay their $5M lawyer bill.
It is interesting to note that while some of the U.S. rules of professional conduct states that a lawyer shall represent a client "zealously", such a requirement is missing in our code of conduct rules.