The reason provided by the company was that while Stadia was built on a robust technology foundation, it didn''t gain "the traction with users," as was anticipated; therefore, Google will begin lowering the streaming service.
All hardware purchases made by Stadia will be refunded by Stadia players via the Google Store. This includes the Stadia Controller, the Stadia Founders Edition, the Stadia Premiere Edition, or a Play and Watch with a Google TV package.
The refund will be applied to all game and add-on content purchases made by the Stadia store.
The majority of refunds will be completed by mid-January. That said, Stadia Pro subscription payments will not be eligible for a refund, but active subscribers will continue to have access to their library during the shutdown period.
All players will continue to have access to their games library until January 18, 2023. This way they can complete their final play sessions and make changes to alternate platforms where possible.
Aside from that, the ability to buy games, new subscriptions, add-ons, or in-game purchases on Stadia has been hampered.