Although I though it would of been more since I was down -$1860 for the month according to my statistics snapshot I took 24 hours ago.
But I don't think this particular bonus includes the losses into their calculations for it.
Stake and Primedice monthly top player bonus works in the same way. I had received this bonus at Primedice a few many times. My highest
bonus was $450 from my VIP host as the monthly top player. If I remember correctly, I had wagered around $300k and lost above $8k in that month. My VIP rank is Platinum III. I think our losses have a small impact on the top player bonus.
Otherwise, it depends on our rank (based on the monthly wager) under the VIP host. Where each eligible rank has a fixed reward as the monthly top player bonus.