It seems Crytek maybe planning a free CryEngine release.
"The developer behind Crysis 2 and the engine behind it, CryEngine 3, has plans to release a free version of their game engine that will be "up to speed" with CryEngine 3. This should help Crytek to further compete with Epic Games and Unity, both of which offer free versions of their respective game engines, Unreal Engine 3 and Unity. "
I suppose it was only a matter of time considering the route both Unity3D and Epic have taken. But will be worth keeping an eye on.