Stake is definitely making loads of money on this $5,000,000 Birthday race, because the wagering cost to the player are significantly higher than usual. The DICE/LIMBO wagering strategies are costing almost $15 per $1000 wagered at times..... where it usually averaged between $9 to $10 per $1000 wagered. 

I am experimenting with other strategies that might give some better ratios, but nothing has shown to be less than the above. Looking at the rankings..... people are wagering millions and I doubt that they will profit from that kind of wagering.