I don't think you fixed the reward. I saw the game today and never loaded the old version. The first run failed at the wave 5 boss with x7 HP, got 300+ credit. The fifth run I manage to beat the boss and failed at wave 6, got only 150 credit.
Viewing post in Hotfix: Credits & Rewards comments
You are right bugcat, the previous fix was about reliably awarding credits, newest version grants more credits while lowering prices for early armory upgrades at the same time: https://michalkomar.itch.io/starvoxel/devlog/1127100/release-notes-v1022 Your feedback is my motivation, thanks!