There are services with varying partnership terms, and there have been services launched with an intent to build long term mutually beneficial relationships that help ensure FOSS projects are well resourced.
“AWS, working with Grafana Labs, will be contributing licensing revenue and code to help make Grafana even better, not just for the AWS service, but also for open source users and Grafana Cloud customers.”
https://aws.amazon.com/blogs/opensource/how-aws-and-grafana-...
All I have to go by are AWS's huge profits and the continuing struggles of FOSS projects involved with AWS to develop sustainable business models.
You’re just showing your ignorance of redis. The project is sustainable without the company as the vast majority of work on the project is done by those who don’t work for the company.
What isn’t currently sustainable is the company. That’s all.