eBay Got Hacked

PayPal:

Later today, eBay Inc. will be asking all eBay users to change their passwords due to a cyber attack that compromised an eBay database containing encrypted eBay passwords and other non-financial information. eBay will notify its user base directly within the next 24 hours with more details.

Why did eBay announce this via their PayPal Media page and not the eBay media page?
Why is this not on the eBay home page or in My eBay?
Why are they waiting to tell customers when they have had enough time to put up a press release?
Why doesn’t eBay have 2-factor authentication?