Amazon actually steals a lot of open source and repackages it as a “managed AWS service”, they literally deployed managed Airflow as soon as it became popular.
The whole aws reinvent is repackaged whatever open source project is trending, hiding control plane from the user and instead expose it via AWS control plane and charge people per usage instead of per server
Accept they also provide the security, billing/invoicing, IaaC, support, provisioning, scaling, list goes on.
As for pay per server vs pay per usage. Heck you know Amazon actually bills the team who caused the cost. And gives finance a report on how much each team is spending and on what. Good luck doing that on prem.
The question is how much do they give back to the open source community, after making boatloads of $$$ off of opensource contributions and whether their model is sustainable and healthy for the FOSS movement
The whole aws reinvent is repackaged whatever open source project is trending, hiding control plane from the user and instead expose it via AWS control plane and charge people per usage instead of per server