The title does not really say it all i guess then. That simply "to" changes the whole sentence. Anyone listening to only that title would enter the shop next week and be pretty sad for not seeing any ssale at all.
Yep, they're on sale on all platforms! Just go to "Buy Crowns" on the game site, click on any of the Crown amounts and it will change to three links to the various platforms. I clicked on them all and each time I was brought to a page to purchase the Crowns and they all showed the sale price.