I joined the class action lawsuit and got a small check a decade later. My proof that I had OtherOS ended up being timestamped whinging on the ars technica forums. My ps3 stopped working shortly after receiving the check due to bad solder, which was I guess fitting.
I got my $10 too. I remember laughing at the amount when I got the check. Thankfully after the OtherOS issue people worked to crack open the PS3, so by the time I got that check I had long since installed custom firmware on it.