What I understand is that Elastic is upset AWS used the name for it's service promotion, stole propertiary code and alleged business partnership with Elastic.
So Elastic felt loosing due to AWS using is assets, so changed the licence to compensate.
Now AWS announces it cuts ties with Elastic by forking Elastic. So what AWS seems to announce is that it will continue to earn from Elastic , still will be using the name and further more it will openly compete with Elastic?
It is an extremely aggressive move, take all and destroy, or am I missing on something?