RedisLabs switched a bunch of their software to nonfree licenses and antirez can't really do anything about it. No matter what he says, I don't think he's in a position (i.e. financially) to oppose that decision by RedisLabs, even though it's clearly against the interests of the open source project.
Sorry but this is absolutely inaccurate. Redis Labs switched the license of a set of modules I never developed a single line of, so it was completely their work I never took part into. The Redis codebase that I and the community developed in the latest 10 years is, probably, one of the last few examples of popular codebases yet under a BSD license. It sounds quite natural that I don't have the right to say Redis Labs what to do with the code they created around Redis itself. I expected the power to say what to do with the codebase I was working on, the Redis core, and indeed it is yet BSD.