The way I understand it, AWS has been creating derivative products that don't work very well based on ELK. AWS has also not been contributing back to the community anything, while raking in the millions for https://aws.amazon.com/elasticsearch-service/the-elk-stack/

Many elastic pros recommend not using the AWS version because it doesn't operate properly.

While I am pro OSS I can understand why a company based on OSS would not want to subsidize a much larger AWS who is extracting value, and also, their direct competitor.

When I talked with AWS about an estimate for Managed ELK, and also, an EC2 based ELK, I received estimates > 50M a year. Crazy pricing