Of all the people who have to pay their bills under capitalism, why are you specifically concerned about the ones who wrote ElasticSearch and Redis?

Well, ElasticSearch is the topic of the link.

But specifically, those two are examples of companies who started off FOSS, then got exploited by AWS.

Every FS-focused person gives them sh!7, but leaves Amazon off the hook because they exploited under the FS rules, which is an inversion of who actually does harm in the world.