AWS wouldn't, I presume, touch the 7.11 dual-licensed Elasticsearch release with a ten-foot pole. They would have to hard-fork it here on, or Gold+ partner with Elastic.co to sell Elasticsearch Service under the relatively more permissive Elastic License.
there is this twitter user that claims that non-elastic employees can't contribute[1]. I wish somebody could summarise this romance between AWS vs Elastic for simpler people because I can't catch up :(