It's also possible that savings on infrastructure costs, reduced engineering hours spent on debugging, etc give them a quiet competitive advantage
Most engineering is not visible to the end-user
I would also like to point out that those "savings on infrastructure costs" seemingly do not benefit their users: They have repeatedly increased prices over the past few years.
I'm also unsure whether they are using their competitive advantage properly. Anecdotally, it used to be that almost everyone I knew was only streaming on Netflix. These days, the streaming services that people use seem much more diverse.
And the best part... you chat with the support and they try to force a how to use our webpage shit on you when you want to report an annoying UI issue. It's really mind boggling how a congregation of idiots with their heads up their asses runs that place.