[Chris Herrmann]

No SoF or anything like that, you can win the split 1 race with 92 registered and all four split,high rated drivers all over, same gains than if you race against 6 people with 200 rating. I ve tested it, several time, even during a long streak of 102, never changed and for example last 3 races , i  got the 102, everytime it was a 0.33 rating increase. First race would have been really high SOF with many 800' and 700', didn't change anything from the others races with lower rated grids

That certainly explains why I still gain! And it also explains why you don't lose so much in a bad race. This makes sense, thanks for saving me from a lot of guesswork
Cheers
Chris