I think that when it is ever a remote possibility, by hook or by crook, nation states prefer to get private firms to compromise themselves as opposed to subversively breaking into a service.

When private firms hand over data or introduce backdoors on behalf of their gov't, the gov't now has political cover and it's easy to make the bad guy the firm the bad guy.

"We just asked for the data, and they complied." v. "We came, We saw, We stole your data"