A copyright holder can't get anything more from you by using the GPL. Infringement is infringement. The difference is that a company is usually happy to settle in exchange for a properly paid license, and an open source hacker instead is happy to settle in exchange for complying with the license. You're always free to take it to court and pay the damages from infringement, but you're not going to end up with a valid license in either case, so you'll have to stop distributing the software.
The actual difference, probably, is that you're a (moral) competitor of the open source hacker, and if you're not a competitor of the proprietary company, they have no interest in undermining the secrecy of your code or causing you to go out of business, even if the could potentially force that if they went to court. They're likely to consider "pay us a percentage of revenues" as a win condition.
Also, lawyers are not like Pokemon. You cannot beat the opposing team's lawyers by having more stronger lawyers. You can certainly lose by having bad lawyers, but you can only be guaranteed to win by being in the right.
> You can't actually be guaranteed to win by being in the right. You can be in the right and lose.
What he's obviously saying is that there is a seriously decreasing marginal benefit to more expensive (and presumably competent) lawyers.
It's better to have competent lawyers and be right than have amazing lawyers and be wrong.
Obviously there are shades of grey, nuisance lawsuits are a thing, etc.
It's probably best stated like "lawyers are not _always_ like Pokemon". Sometimes they very definitely are.
This is a copyright license at its heart. It is a contract between the copyright-owner and the service owner. The end user is just 3rd party.
I'm still wary, though. I could imagine if the resultant fines or source code releases from violating a GPL license weren't a strong enough deterrent, you could win by using a GPL-licensed product enough, then parry off attacks from EFF/FSF until you do a complete rewrite of the product underneath, then pay the fine/contribution to EFF/FSF while toppling the original company. If the company is big enough, and can afford enough good lawyers, there may be legal ways to get around laws.
https://news.ycombinator.com/item?id=7572332