I must not have been the only one confused how exactly it counts as an Amazon rip-off rather than a community maintained version of the open source part of Elas

I must not have been the only one confused how exactly it counts as an Amazon rip-off rather than a community maintained version of the open source part of Elasticsearch. And frankly I'd still be interested if anyone could clarify how exactly this code can be considered Amazon's. I did however notice that Amazon claims copyright on the github repo, which is interesting I suppose.