> Elastic wouldn't be able to integrate Amazon's patches back into their codebase without losing the ability to change the license in the future.
(I anal, even if I were a lawyer, I am definitely not YOUR lawyer, yada yada)
If I were Elastic, I would require Amazon dot com or anyone else who wants to contribute code to Elastic to sign a CLA. Depending on how the CLA is structured, this could allow Elastic to continue multi licensing?