I won't tell you that it's impossible, but I don't think there is going to be a VGA sale at this point if it wasn't up yesterday.
@IH8UofA : Stadia hasn't even been released a month yet, and in reality only to a limited supply of founders edition and once those had sold out the Premier Edition.
I wouldn't hold out on seeing reports of units shipped and user base until the next set of quarterly financial reports get released in early February 2020 (or whenever Alphabet announce that they will report earnings), and even then I don't know if those reports will go into that detail in relation to Stadia, it might be that figures won't be available until some time after the Base edition is released whenever that will be in 2020.
But I wouldn't expect to see any numbers for a good while yet IMHO.