It really isn't worth it. The steps that would aquire the $30-40 would cost way more legal fees. What happens is, until they properly file the paperwork, they still exist and they still owe you. You have to file a claim with Peerfly, they will more than likely deny that claim, and the next course of action is a lawsuit to recover the debt. This wouldn't even guarantee the cash, though, because by then Peerfly is going to be 100% broke and bankrupt.
The way they set this up, they protected themselves from getting sued by the big accounts and making it not worth the effort for the smaller accounts. I understand the emotions, but they actively sought newbies that were dismissed completely. And it's not really about the money earned, it's about the money spent to earn and I don't think I ran across many newbies that didn't start at a loss.
To be honest, the person I really hate seeing wrapped up in this is Luke. He's always been the bridge between Peerfly and any affiliate he could help, and it looks like he's still powering through.