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Computers are machines for war; if your computers aren't liberated they're working for someone else. You pay for the hardware. You pay for the software. You pay for the electricity. You pay for the data-connection. You create content/data. They take it all. They keep the profits. They don't even pay nominally for the labour.
Shoshana Zuboff will claim it's surveillance-capitalism. I claim she's a reactionary reacting to a new domain of exploitation under capitalism that the intelligentsia were previously protected from. It's not new; it does not need a clunky prefix: it's still just capitalism. Only now this particular type of exploitation can be done invisibly, silently and on an industrial scale that spans the globe.
Apple, Google, Microsoft, Facebook, et al kills. If you use these technology companies you contribute to sophisticated targeting-software used by militaries to kill. You're not a goofy innocent, just wanting to post 'selfies' to Facebook on a Google-Android mobile-computer. You're willfully ignorant at this point.
Putting aside ideals of privacy: economically you're being exploited with no nominal compensation at all. You've been trained to grovel and you wonder why tech-bros have a god-complex as you use their software obeying them absolutely.
You're either free or a slave. Maybe drone is more apt: computer says go here; computer says take photo; computer says input real-name of person photographed; computer says buy this; computer says don't think--just accept--just agree--obey! The computer will set you free!
Addendum: the frustrating thing is this is a matter of consent. It can be halted entirely, but it requires users to make a choice: reject proprietary software. Think about what the software is actually doing with those CPU cycles you pay for. Stop donating data, capital and other resources to these surveillance networks.