Quite honestly, I don't think they would lose that many clients. The USG has been trampling over the rights of non-US citizens for years. Snowden's leaks showed just how bad that is. The truth is that the vast majority of those people don't care enough to do anything about it.
Even people who do care (and are technologically minded) still have their Gmail, Yahoo and Hotmail email accounts and online file storage. The effort required to change is greater than the threat to their privacy.
That will not change until the loss of their privacy actually has a visible and impactful effect upon those people. I.e. people start being persecuted by the government for their beliefs or actions in private.
Modern western government's are too smart for that though. Those kind of non-subtle sledgehammer tactics don't work in a society where bad publicity can't be controlled. As an example, see the UK government's U-turn on immigration policy after the public's reaction to a photo of a two year old drowned immigrants's child on a Greek beach laying face down in the waves.
This is false. The mission statement of the company lays out its responsibility and what shareholders can expect. Shareholders choose to invest or not. A not-for-profit company is an example.
You're underestimating the amount of industrial espionage that the U.S. does to favour its multinational corps. MS, Apple et al. were fine to benefit from the fragments this might bring them when it was a fairly well guarded secret and it was assumed that the U.S. was on relatively equal footing with other countries such as France, UK, Germany, Japan in this regard. The Snowden leaks show that the NSA capacity is a couple orders of magnitude larger than any other country and suddenly the U.S. players would lose more business through distrust than they would gain through government espionage.
Wandering off-topic as I am, that's just an opinion that gained ground in the seventies. Not everyone thinks it's a good idea and with any luck it'll die eventually.
So? The relative freedom of modern democracy is significantly tied up in the rise of independent merchant/commercial classes.