15K$ wagered in just 1 month? That's a lot, meaning that includes the total amount you've lost dude?
It is surprising for me that you are surprised by the wager of $15k only!

Just claimed the post monthly bonus, I got less than my prediction because I got $17 only lol. How about you?
I got $16.2 from the bonus. It means our bonus was almost same. My losses didn't have any great impact on the bonus amount. We know the factors which have impact on the bonus amount. Still, the bonus parameters are mysterious at Stake.