Horseshoe Council Bluffs is offering 10x rewards if you swipe before 10am. Does that mean I can earn Diamond status for 1/10 of the expected losses? The Iowa post on the first page of this thread says the expected losses to reach Diamond status on the 9/6 Double Double Bonus machine is $510. Does that mean expected loss only $51 with the 10x reward? Are there any catches?

Here's the full wording of the promo:

The earlier you swipe, the higher the Multiplier.

Swipe your Caesars Rewards card at a Horseshoe Promotions Kiosk during one of the scheduled times to lock in your GUARANTEED Reward Credit Multiplier.

6am – 9:59am | 10X
10am – 12:59pm | 7X
1pm – 6am | 3X

Guests may only swipe once. Once a guest has swiped and received a Multiplier, that Multiplier will be locked in and will not change for the entirety of the promotional day.
I'm very much a newb at both video poker and hunting rewards credits. I'm not even sure where the promotional kiosks are that you need to use. Anyhoo, the Iowa post says,

25c/credit, 100-play ($12.50-$125 per hand)
Do I have to play 100-play? Can I play single play to minimize my variance? Like, I assume if I'm playing $12.50 per hand showing up with $1K should be reasonable. If I'm playing $125/hand, I'd need to walk in a with a lot more cash?