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?

If I have it on and win - was it the bonus, was it home advantage, was it my heavily skewed striker, was it the red (/blue) arrow, was it my lucky red socks.

As I've said before I take any legit opportunity of gaining an advantage. Therefore I will use win bonus until losing that cash becomes a disadvantage.

This is a game and game mechanics do things, but usually they are one insignificant part of a significant whole. Lets call it aggregation of small gains. Or....smoke n mirrors. >.<