AWS's model seems to be to take a popular OSS product, do _just_ enough to make it work with AWS, make tons of money out of it, contribute a minimal amount back... and then act all surprised when they're painted as the bad guys.

Take postgres. RDS is a core AWS product. They absolutely rely on it. But if you take a look at https://www.postgresql.org/community/contributors/, are any of the current major contributors at AWS? If they are, I can't see them.

It's okay to behave like that when you're a small or even medium sized tech company. But when you're the world's number one cloud service, by quite some margin? Hmmn.