Did he really get no bounties out of this? The guy found a way into build boxes retail Windows is built on, potentially found the private key that would be used to generate license keys, likely could have dived in a little bit more after getting RCE on the build box to exfil the latest Windows 11 source code. He even found a way to issue rewards. They still gave him nothing?
If Azure's horrific security track record (tens of exploits, often cross-tenant, often trivial) over the past few years doesn't give you pause, their joke of a bug bounty definitely should.
Obviously nobody with power cares about security in Microsoft's Azure branch. Why does anyone trust continue trusting them? (I mean, I know that Azure is not something you buy by choice, you do because you got a good deal on it or were a Microsoft shop before, but still).
If their rules say this doesn't deserve a bounty their bounty program is a sham.