Elastic was suing them for trademark breach. Hosting didn't bother them - it is FOSS. Lying that they were in partnership with Elastic did.
They literally changed the license to one that's only different in not allowing people to host it the way Amazon did.
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Introducing the Amazon Elasticsearch service, a great partnership between @elastic and #AWS
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How was it a "great partnership" if one side didn't even know about it...