You appear to be conflating ethics and legality. It is perfectly legal (for now) for social media giants to spy on their US users in increasingly intrusive ways

You appear to be conflating ethics and legality. It is perfectly legal (for now) for social media giants to spy on their US users in increasingly intrusive ways, but many would argue there are lines in there that cross into unethical. Perhaps legislation will follow to enforce this ethical stance over the coming years as has happened in the EU, but the absence of such legislation does not preclude it from being unethical. The objection to Google's interest in the Chinese market is another example where ethics and legality don't match up. Anecdotally, I personally find it ethically indefensible to abort a child due purely to sex, despite otherwise being pro-choice.