Two aspects, the first is what I was referring to earlier:I reached the blue badge after my 8th race (the screenshot shows 9 races, but I had already earned it before then, there wasn't a notification like there was after the tenth race), and the green badge after my 10th.
@Lazza Did the two DNFs in my first races somehow affect how the badge system was calculated?
1. You have a Rookie badge until you complete 10 races. Your 8 finishes + 2 DNFs were 10 races, so at that time you moved out from the Rookie badge
2. Your badge at any time is a result of your contact rate over the last 10 races. You got a Good (blue) badge based on your first 10 races, which most people will get (at least) with decently clean driving. Staff (and users) have said you can maintain a Trusted (green) badge even with multiple light contacts per race.