A couple answers…
Why do you think for even a moment that they would buy only one copy, rather than every available copy of something rare and difficult to get? Anyone doing this stands to gain from destroying the only copies of something that has scarcity, to stop competitors from ever getting access to it. That's a serious concern.
Why would they do that? What is this 'should' to a company that would do this in the first place? Are you not suggesting the opposite of what they aim to produce?