I too got the email from DJI this morning and ordered my gold tip props, from DJI, the platinum ones are still out of stock.
If you noticed at the bottom of the DJI store listing it states that ...
"This product is manufactured by SZ DJI Baiwang Technology Co., Ltd. affiliated with DJI Group"
I sent and email to customer service at SZ DJI Baiwang Technology Co about a month ago, when all the props where showing up on eBay and ask it they were the official DJI props, and was Baiwang Tech send out official props to 3rd party sellers, and received a reply from Baiwang customer service just stating that "I should wait until the props are available on the DJI store before I buy them". No other information as to if the props I was seeing were official DJI props or not. But my guess is that they were not. Baiwang Tech did not elaborate.
So I waited until I got my notice from DJI today and bought a set.