Cloud equals not your computer, folks. Any cloud company can be legally subpoenaed and required to hand over any data they have, and they can also be legally gagged from telling anyone about it. Doesn't matter if they support it or not, they are a corporation subject to the laws of their jurisdiction and disobeying can expose the directors personally to civil or criminal penalties. Every corp will comply with a legal subpoena, and those are often easier to get than warrants.

For you they at least require a warrant. Usually. Unless you're crossing the border or are undocumented or something.