@FATHOG That is definitely not the case. Some YouTube Premium members indeed got an offer for free trial of Stadia Pro, but it's not everyone.
Starting today, you'll be able to sign up for trial for Stadia Pro for two months though. The rollout is expected to complete within 24 hours so try checking back later if it's not enabled on your end.
https://blog.google/products/stadia/try-stadia-free-today
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Stadia Guides are not employed by Google. Opinions are my own.
