Hm... that's not at all what I intended to convey. And I think you're putting things in quite extreme terms.
The field of software / digital engineering has grown an exploitative side. This is absolutely true. To be crystal clear, without diving into detail and derailing the thread: I find this evolution reprehensible and not how humans ought to be treated.
Is that dynamic then the result of Open Source as a princple of intellectual rights? Is it really, truly an inevitability that taking on Open Source projects and pushing code on Github now singularly serves as a resume of sorts for applying for a paid job? Is giving up your intellectual rights by default really the only way to ensure that you can make a living from writing code?
Because of it is, well, that should rather lead to bleak conclusions about the state of the value that developers are willing to attribute to the time and effort they pour into their craft, the labour market, labour protection, and societal values as a whole. Instead of concluding that Open Source itself is the problem (it is not) and people ought to donate a buck-and-a-half to anyone who has a repo with an arbitrary number of stars on Github.
You could draw parallels with other fields such as academics, film, music, games, books, fashion and so on. So, exploitation is not an entirely new dynamic either. Plenty of aspiring graduates, actors, writers, musicians, models, graphic designers,... are scrounging by, and get exploited in the process, while relatively few end up in a good place. Usually, their complaints are met with a short, unsympathetic "should have chosen a real career/job instead!" quip. If I'm allowed to play the devil's advocate: Should we add software developers to that list as well?
Of course not! In fact, nobody deserves to be outright reviled for the professional career they pursue.
The problems you describe are societal. They are the net result of larger economic dynamics in a rapidly globalized, free and unregulated marketplace. A markpetlace in which a few smart people understood how to leverage open source software in order to accumulate enough leverage to enter the financial market, moving on to accrue even far greater wealth. And what you describe is just another take on the Tragedy of the Commons.
Like I said, if the world is reconfiguring around software, it should be held to pay the true price of maintaining that infrastructure. Much as is pointed out exactly by Eghbal's study. After all, there is no such thing as a free lunch.
Or as Mike Monteiro puts it: https://www.youtube.com/watch?v=oEa6PdOG2ts