After losing, I went to Imperial Casino (also sticky 100% match of $200, 15x WR), and got up to $700 on the way to my target of $850, but then fell back down to $150 at the time I crossed the $6000 WR line. I kept betting $50 a hand, and a few minutes later, after hitting $0 and bouncing back a few times, I finally lost for good.
Casino Extreme: $200 match bonus: -$200
Imperial Casino: $200 match bonus: -$200
Something-out-of-nothing to date: $2,915