They have a problem with their business model, then. License changes to a formerly open source project are costly. The community reacts very strongly when license terms change after they've come to depend on a product, and they should.
Why do we apply this standard to MongoDB but not to Apache, Linux, Postgres, or MariaDB? One purpose of an open source license is to allow many providers to provide the service. As I've talked about here previously, Elasticsearch wasn't able to provide the service I needed, so I had to move to AWS.
It's weird to me that the Hacker News community doesn't think that sort of competition is good. The narrative seems to be that all these businesses are somehow victims of AWS, when it seems the truth is much more straightforward: they provided open source software and people used it. The fact that their business had no working plan to actually monetize that foundation should not be taken out on the community.