Short version:
Myanmar had sanctions against specific types of business trades against it, none of them involving anything like "digital games".
EA decided to roll out an update including blocks against Myanmar, despite there being no requirement to, and after the sanctions had been lifted to boot. (Circumvention via VPN possible.)
Users not informed, refunded, or given anything remotely resembling due diligence at all. So far no support response, only from a volunteer helper.
Edit:
According to https://www.reddit.com/r/Games/comments/5a5oxf/ea_games_and_... it may even be import sanctions on crypto put up by Myanmar itself.
