Earlier quoted context omitted.
With Amazon AWS I had fun exchange a couple of years back. They don't have a bug bounty (still I think), but their response was that they will fix it but not publicly recognize it because "the cloud is always secure"? Go figure.
This is hyperbolic nonsense. Having worked at AWS, I've never encountered a business that is more serious about their security position.
Amazon still doesn't offer a bug bounty program to my knowledge. Also, it's the only cloud provider my active security researcher friends tell me that attempts to regulate them by some weird pen test authorization requirements which are very foreign to industry standards of other cloud providers.
I'm just on the side lines watching, but there is a difference of how transparent AWS vs. GCP vs. Azure are when it comes to security. GCP > Azure > AWS