what is \"modifier loss\" ??? (EA Sports UFC 3)

Hello !!!
I've got an interesting thing )) So that day when beating a player give me 400 money... I don't understand... was Usually 800-950. And that 1100 was rolled. And so a few times. Different weight.
Then look at the table points and it says Unit losses that took me 350 or 400 points/money. And it is written Modifier loss = -400. Stuff like this (( What is this ? Where it came from. And it is every time you win ! Knockdown was not...even the loss of balance was not (stun) ?!