So I haven't purchased the Renegades expansion, but completing the intro mission still gives me 500 Credits. I have 1500 total for doing it on all 3 characters. Used it to buy a blaster from the vendor behind the Bazaar. However, there is no tutorial window in the game itself on how to earn or find more. Not only does the game not tell if Credits can be exclusively earned through Renegades' campaign and activities or the general free-to-access portions, but I've gone around Tharsis Outpost for general exploration and found 50 random Credits. Just a random prompt to interact at an unmanned stall. Idk how to earn more Credits without Renegades ownership, but if anyone else knows please tell me. Even game journalism sites' stated potential ways aren't panning out