How about USA government instruct the owners to cease access or take ownership like with Kim Dotcom's New Zealand (?) based storage company.
I don't recall hearing about anyone recovering access to their data in that case?
This makes every additional user an increase in risk, as even without a warrant it seems if USA TLAs consider someone a valid target then those servers are going down (or getting taken over by people with unknown service standards in order to run a sting, or ...).
tl;dr you have to worry about accusations (of law breaking or copyright infringement) against others too as some jurisdictions have a strong overreach in such cases.
I don't recall hearing about anyone recovering access to their data in that case?
This makes every additional user an increase in risk, as even without a warrant it seems if USA TLAs consider someone a valid target then those servers are going down (or getting taken over by people with unknown service standards in order to run a sting, or ...).
tl;dr you have to worry about accusations (of law breaking or copyright infringement) against others too as some jurisdictions have a strong overreach in such cases.