I set up my Stadia last night and it is working great so far. I’m stumped, though, trying to figure out how/whether I can add my children to my Pro account so that they can game share. Is there a way to allow them their own profiles/usernames without paying multiple monthly subscriptions?
From FAQ, it doesn't look like the feature has been enabled yet
How will Stadia Pro work for a family? Can I share it or not? (i.e. Family Sharing)
Stay tuned for more details on upcoming Stadia features.