Quick note that the SF Conservancy has been advancing a scary new approach to liability with GPL. Historically, the rights and responsibilities related to GPL comes from the copyright holder. If the GPL was not followed, the person who wrote the code could optionally take action. This actually works out pretty well, because folks who actually code tend NOT to file frivioulus type legal cases and things were reasonabl…
It depends on your viewpoint. GPL code authors rarely have the means to pursue legal action in response to license violations. As a result, GPL code is generally "stolen" with impunity.
"As the ex-maintainer of busybox who STARTED those lawsuits in the first place and now HUGELY REGRETS ever having done so, I think I'm entitled to stop the lawsuits in whatever way I see fit. They never resulted in a single line of code added to the busybox repository. They HAVE resulted in more than one company exiting Linux development entirely and switching to non-Linux operating systems" - https://lwn.net/Articles/478361/
Here is the SFC's issue (came up when busybox replacements were discussed)
"What can we do? The real problem here is that the SFC's reliance on Busybox means that they're only able to target infringers who use that Busybox code. No significant kernel copyright holders have so far offered to allow the SFC to enforce their copyrights, with the result that enforcement action will grind to a halt as vendors move over to this Busybox replacement."
What's weird is despite NO significant copyright holder going along with SFC, they keep on marching forward as if they are backed by folks creating this code.