Seriously, with the rotten-ness of the US patent/copyright/political system, it's better for mankind to just say "ok, US users can't get this, but everyone else can".
E.g. many European banks do this for "US persons" - they simply cannot get accounts because the legal risks are just too high.
Edit: It's not just banks. E.g. BMW Group (and likely other huge non-US corps with US subsidiaries) refuse to allow US persons to look at financial statements, again due to regulatory hassle.