Bingo. They aren't paying advertised rates. Google will have margin but not as much as usual. Snap also has google by the balls here. What if snap comes out with a statement saying Gcp sucks and they're moving to aws?
Yes, I do think Google's biggest customer leaving their platform vocally would be more impactful than Google promoting/defending itself.
If Snap threatened to leave I'd wager that even the CEO of Google would get involved to keep their biggest cloud customer. Snap's revenue and brand name have enormous value to Google. There simply aren't that many $2 billion dollar cloud customers right now.
without knowing what's in the contract there is at least one way I can think. Make a statement saying all new workloads are being deployed elsewhere. Lots of ways to play the game.