Affiliate Marketing Secrets

I promote online games where players make real cash deposits and can win real money. Each player is eligible for a bonus comp on their deposit. Meaning, if Player A deposits $100 they receive a $100 bonus.
If Player A loses, then they lose not only their deposit but also the bonus.
At the end of the month these bonuses are deducted from the Gross Gaming Revenue of that month. However, I don’t see how each bonus can be deducted if the player loses this back to the house.
If Player A receives a $100 bonus but loses the bonus, then the house is neither ahead $100 or lost $100, they are in fact even.
If Player A wins and makes a withdrawal then yes the house is out the $100 bonus. Then and only then can the house deduct this loss of $100 bonus from the Gross Gaming Revenue and of course any winnings cashed out by Player A.
However, and maybe I’ve got this wrong, but how can a $100 bonus be given, then lost, effectively being returned to the house and then being deducted? That doesn’t make sense.
It’s similar to me lending a friend $100. At that point I’d be out $100. However my friend returns the $100 and I’m back to square. I’m neither out nor ahead, I’m square again.
My question, given what I’ve tried to explain above, does this make sense, or am I being diddled on bonuses being deducted when they should not be deducted at all?