The US government can use that information for bad or good purposes. This applies to information about US citizens and other citizens. It is easy to see why the US government would use that information for good purposes (like say, prevent a terror attack) for US citizens. (proably bad things will happen to US citizens too, like imprisonments for political reasons)
But it is very difficult to see why the US would do anything good for foreign individuals / corporations (unless we accept that the US is the world government, and has the interest of all of us in its heart, which is ludicrous).
So here we are: a government taking advantage of the technology developed by (mostly, but not only) US companies, to further a political agenda.
I expect global boycott of US based cloud providers. It does not make sense anymore. This is a trust which can not regained, since we have seen the tactics involve flat lying - even legislation to force companies to lie.