ACG downtown grand 5X points coupon

Does anybody know how long the Downtown Grand 5X points coupon is good for? One day, one session, etc.?

They gave me $10 in free play for that coupon. They also gave me $10 in free play for the 4 and 10 free odds bet coupon. So $20 in total in free play for both of those coupons.

Can you explain why they did that. Are they not honoring the 5x coupon, but instead giving the free play?

Hmmm. So to get $10 in free play under the original terms of the coupon, you'd have to have $1000 coin in. Expected loss on a 9-6 JOB would be $5. At $5,000 coin in, you'd get $50 in free play at an expected loss of $25. I wonder if they just figured it's easier to give the free play than mess with the points or people were hitting it hard and this is cheaper for them?