Redis is in the same position as many other companies in the open source tools space that have also done well: Grafana Labs also comes to mind. When large enterprise and government clients want to use open source infrastructure like Redis, they invariably have a myriad of requirements that aren't obvious to anyone who doesn't work at that scale. They are willing to pay a lot of money to solve these enterprise scale problems even though the underlying engine is open source, since building the tools to do so themselves would easily cost even more.