Just a heads up, it looks like the purchase button for the Crown Jewels offer in the Store is busted. It doesn't show a price and clicking on it immediately gives an error.
I saw other folks mentioning this too, so I don't think it's just me.
Seems to be fixed now for me! The price is showing now, and tapping the purchase button works like any other store offer, so whatever back-end change was made to the servers (?) seems to have fixed it.