Did the entire staff catch the coronavirus? Is this why everything is dead silent?
It's more likely that getting a game/porting a game to stadia costs actual money (which is why many of the games were old by the time they hit stadia) probably to the tune of a few hundred thousand or couple of million (thanks to Epic paying huge for mediocre games). Pre-release, Google probably thought of these as necessary investment costs to build a library.
Post-release, however, they have explicit data on console sales (we don't) - but let's be extremely generous and assume they sold 100,000 Stadia Units and put it into a hypothetical math scenario. Let's say that Stadia wants to port Control, a smaller title that found some success last year.
Epic Games Store allegedly paid $11 million for exclusivity. Let's say that Google would have to pay $1,500,000 for non-exclusive title and for porting it over.
$1,500,000 / 100,000 (units sold) = cost of $15/per user.
Now let's say that Google sells control for $60 (full price, despite the fact it's cheaper literally everywhere else) and they have a standard 70/30 split with the developer on sales. This would mean they make $42/per sale of the game.
$42 - $15 (the cost of the license/port) = $27 per sale.
If literally every person buys the game at full price, they can make $2.7 million.
If
half the current owners buy it, that drops to $1.35 million (less than thier initial investment).
If a much more realistic 1 in 10 buy it, that number plummets to $270,000 (literally ~20% of thier investment).
It's also worth noting in this hypothetical, that Control is on sale for $30 - but if Google were to match it, they would lose $3 on each sale (unless the publisher ate some of the loss for pushing for a sale).
This is obviously rough math, but with a small userbase they've got every game they have to pay for/port because a huge risk with little reward scenario - and that's on top of them having to sell old games at big prices - competing with Steam/Epic, Sony, Microsoft, and the second hand game market.