I would guess that Oracle isn't expecting their customers to love from AWS to Azure. They are expecting they move to Oracle Cloud. I didn't see any mention of that in the original article but I wouldn't doubt those rules either didn't apply or could be bypassed by your friendly Oracle sales person if you wanted to get a taste of the Oracle Cloud.
It will yet again hurt their image though; they've been hated by geeks for ages, but they are increasingly unpopular even among executives. How long can you do business with people who openly despise you?