I’d say that so far, it’s a matter of this being more of a publishing deal than a last minute cash grab, and the fact that it’s just one. Quantity matters. I can understand a few exclusives as being reasonable, especially if they’re funded from the very beginning. Grabbing every big game that comes up is not acceptable. Doing it with crowdfunded games that have been paid for by gamers is even worse IMO. In general though, I consider all exclusives to be bad for the consumer.
Another point is that Stadia isn’t exactly a PC platform. It’s closer to a console in how closed off it is. Not that I consider that a great excuse either.