I have a question.
How do you expect anyone to be able to say with a reasonable accuracy if win bonus does anything or not? How would they tell?
Hey buff , I don't.

As I’m saying, I don’t expect to find a convincing answer because I couldn't find a way that we can measure if the win bonus affects and how much. I have another team few lvs bellow but I can’t make the experiment because (even with the same players/formations/ conditions …), I must test the two teams with or without the bonus, at least 2-3 matches for every case , considering the random effect of the program.

I think the answers are based more in psychological factor.
That’s why I ‘m staying focus in these three questions hopping that someone has something more concrete.