> Nearly all of them work at cloud providers so they literally just followed their income stream.

Sure. And same for Redis employees who continue to work on the Redis Github project. All my significant contributions to open source have had financial incentives as well.

I know this doesn't mean much, but I spent a lot of time outside of work helping to maintain the Redis codebase. I attended our meetings and responded to issues on vacation because I cared about the community, it was more than just a paycheck for me. I don't regret doing any of that.