No, it's GPL. It's a perfectly reasonable, and not uncommon, strategy to use legal instruments for protective or signalling reasons but not as an offensive weapon.
Patents are a similar example. They're often held defensively and for cultural signalling. When they're pursued aggressively, it's generally considered trolling.
And yeah, it's a sweet deal. TBH I think that's the point - a lot of people get a sweet deal, including corporations. Where the argument seems to lie is how much should we care about free loaders if everyone's getting some candy.
The point is that people going to the SFC for help are clearly "not getting some candy", otherwise they wouldn't be bitching. A "non-enforcement" deal is much, much sweeter for corporations and sociopaths than it is for people doing the actual work.
I.e. corporations get all the benefit of free contributions, but don't feel any need to contribute in return unless they happen to feel like doing so.
And "Let's not scare the corporations" is the new "enforcement."
Sweet deal for them.