Not sure that paying for support is even that helpful. I was responsible for a few tens of millions of dollars in client GCP spend (admittedly, a small fraction of client AWS and Azure spend), and I only spoke to any official GCP reps once -- and they were from a recent acquisition. Our GCP team had closer contacts, of course, but as far as my experience went Google compared unfavorably to both AWS and Microsoft, who were happy to throw SMEs at me anytime I had a question. (Even so, there's a lot I do like about GCP, even if I'm a bit uncomfortable with its long-term prospects.)