This makes no sense. Your comments was specific about investing. If you buy $1000 in GOOG shares, you don't get to allocate where your investment goes for how long. You give the money to Alphabet for them to decide where it is best used.
Yes, the consumer can decide on how much to spend on Stadia. Of course, one can choose to spend nothing now and wait for the service to mature.
And remember that spending money on Stadia, GeForce NOW, Apple Music, whatever isn't investing in GOOG, NVDA, AAPL. Those are all expenses. Buying a Radeon RX 6800 XT graphics card isn't an investment in AMD. It's an expense.
Again, the problem is that Alphabet's commitment to Stadia is highly suspect and isn't particularly encouraging.
It's worth pointing out that most of Google's failed products and services had a free tier. I've tried most of them (Picasa, Wave, Plus, whatever). It's up to each individual to decide how much time to spend on any given service (Facebook, Instagram, TikTok, Myspace, Path, Periscope, Flickr, Vimeo, whatever).
One thing for sure, Alphabet has a lot of financial resources and can keep services running far longer than some tiny little startup with almost no money. I use quite a few services today that might not be around had Alphabet/Google not acquired them. Did you use YouTube before Google's acquisition? I did.
And money doesn't guarantee success either. Look at Siri, Apple's personal assistant, arguably neglected compared to Amazon Alexa and Google Assistant.
The point of this thread discussion is Google Stadia's viability as a competitive cloud gaming service and Alphabet business unit with future revenue generation prospects.