Its’s complicated, but basically, Amazon also basically spun off Lumberyard into the fully open source, O3DE engine.

I am not sure if they still hold any particular rights to anything exclusive to Lumberyard, but yeah, O3DE is basically Lumberyard from some years back, that got handed over to a non profit, and has since been developed by that non profit for… 5 ish years? More?

The other wild thing is that… somehow, Cloud Imperium / Chris Roberts of Star Citizen… also got a version of Lumberyard/Crytek, or something like that?.. Before Amazon then later spun it off as O3DE.

So… the crytek engine has very weird family tree, at this point.