How did you contact eBay to ask? They do not read the forum, just fellow buyers and sellers, many of whom have indeed responded each time the Managed Payments question is asked 

Managed Payments is real, announced over a year ago

BUT there is now also a scam running that asks for 'government ID' 

Other members have no way of knowing 'which' email (the real thing, really from eBay) or the phishing scam each person is getting

Is the message also in eBay messages?

Is the email from a real eBay email address, or a fake (ie ends in a 2) ?

I would say scammers hoping to take advantage of the real managed payments change