Earlier quoted context omitted.
iMessage is extremely secure and utilizes end-to-end encryption, why is this concerning to you?
And it has spam problems: https://www.wired.com/2014/08/apples-imessage-is-being-taken... The problem is authenticity and authority, not encryption. How can the user know this message really came from Apple and not a spammer?
There was even an article on HN a couple days ago about a money transfer service phishing scam whose initial message looks very similar to this message from Apple.
I think a LOT of people will fall for phishing with cold messages that look like this