As title states just curious as to what the ES Dev Award was for those who got the code and registered it was cause I've been rattling my brain trying figure that one out.

Thats not for pre-orders, actually. It was for those of us who paid $35 for Emperor edition, which became lumped in with Classic for $30, since Disharmony+ES=$35. So basically its for paying an extra $5 for the game. ofc, I dont think it can be obtained now, since technically EE (emporer edition) is no more