Before Steam patch that one they sayed "Credit gain will permanently increass by 1.5x", and nerfed it in 200%.
That is one image with a tier 7 ship, to ilustrate how many credits I won, before steam. with t9 the won is around 4500-6000 credits.
My won now after steam patch with T9, this is a lose, but a win give only 500+ credits (higher tier, higher gain right? )