I didn't gold them easily enough to start doing it for other people, but I still don't understand how the scoring system works. The only thing I found that reliably gives more score is drifting over as much distance as possible, i.e. you need to start the drift just before the zone starts. I never managed to see any relationship between speed and angle and scoring more points. In the end when I got gold it seemed like it was pure luck, I just did them over and over again until the random score was high enough.