Why most companies pick Unreal Engine 4 instead of CryEngine 5

I really don't understand this, CryEngine 5 has so much advantages over Unreal Engine 4. 1st, CryEngine 5 is Free (if you want it to), According to this post 2nd, CryEngine 5 give you source code, according to Get CryEngine page But I see the list of game made with CryEngine 5 and list of game made with Unreal Engine 4, I'm stunned that a lot game titles choose Unreal Engine 4 over CryEngine 5. One claims that game titles pick Unreal instead of their proprietary engine because But why not go with CryEngine V? Am I missing something?