It seems that Premium Keg promotions are back with Homecoming, but unfortunately not in the same way as we knew them before the update. Until Tuesday, November 20th you will be able to purchase Premium Kegs from the store with real money only, at a higher price than the regular Kegs.
Quote from @PlayGwent
Shupe found some shiny Premium Kegs for you! You can buy them in the shop until Tuesday, November 20th, noon CET. All cards in a Premium Keg are animated ✨
This offer is only available on PC.