That article doesn't support your point, except perhaps for IBM and it's hazy to me what exactly that revenue is. It's certainly not from the type of developer-targeted infrastructure services that AWS is.
As for Microsoft, quoting directly from your link: "One person has told Business Insider that Azure revenue is at $1 billion lifetime since its debut in 2011, but is accelerating quickly."
As for Microsoft, quoting directly from your link: "One person has told Business Insider that Azure revenue is at $1 billion lifetime since its debut in 2011, but is accelerating quickly."