theoretically, yes. practically, no. there are many layers of technical and policy controls in place to keep random SREs from touching customer instances.

Well technically, yes. But if you look at it that way, then amazon owns a lot private info belonging to other huge corporations that use their services. Amazon tells you that the data is "secure" and they respect their customer's data, but how far does their "concern" for your data goes, i don't know either. Someone more knowledgeable with the legal technicalities of cloud providers and their obligations to the state should be able to tell you more. But, obviously, if the state is involved - you are stupid to think that CIA doesn't already have the info and capabilities to read any byte stored across any disk that AWS controls. If you want to fight the USD hegemony, you can't use their own infrastructure on their own land (includes land they bought in other countries) to defeat them - that's being stupid, and the opposite of sovereign. Uncle Sam will come for you if he wants to.

This is my understanding as well. If it's in memory on someone else's machine, it's theirs.