Google has updated its Chromebook perks page with a couple of nice Stadia gaming offers for new buyers of listed Chromebooks on the Google Store. One delivers three months worth of free Stadia Pro access while the other offers a US$20 discount off the Stadia Premiere Edition bundle.
https://www.notebookcheck.net/Three-months-of-free-Google-Stadia-Pro-gaming-added-to-the-Google-Chromebook-perks-program.484047.0.html