I really have no idea how they could have been found guilty. With currently existing technology it's impossible to tell with 100% certainty if a particular torrent file links to a work that is actually protected by the plaintiff. It's legally highly dubious whether possession of a useless, encrypted segment of a protected work is equal to possession of the complete work.
And, of course, the most compelling evidence of all: The Pirate Bay is really just like Google. They're both search engines differing only in what they search for. (The Pirate Bay only points you to torrent files, all of which are legal without exception, whereas Google can give you anything from MP3s to YouTube versions of entire movies.)
Technically, they weren't even linking to illegal material. They were linking to perfectly legal torrent files which linked to the
people who have the material, who then, on their own, made a P2P connection to send the files. Shouldn't that mean, at best, that torrent files are illegal, rather than the sites that contain them? If The Pirate Bay is guilty, that means anything that arbitrarily helped this process should be illegal too. Including the torrent program, the web server the site was running on, the TCP/IP layer in the operating system used to send the packets, and the network cards and cables. All of these things "help" to make the process possible.
I think the judge must have decided on the guilty verdict because they call themselves "pirates", even though there's nothing illegal about calling yourself anything.
So what if they did make a little bit of money on the side? It's not like they charged for anything. It sucks that the court of law all around the world regularly misunderstands the technology they're judging.
With the gigantic server park they need to survive the daily search and torrent download requests, I'd say it's not very likely they are making any kind of profit. I don't know exactly how they get the funds to purchase and replace their equipment, but the site's advertisements would probably only barely keep them in the black.
I mean, really, they're not going to be able to pay this bill. They don't have any money!