Tried it again this week. Didn't play as long on the slots (promo is slots only, no VP) and the scratch offs paid off much better. Got 6 $10 free play, 5 $20, 8 $5, 2 $40, 14 of those annoying lunch buffets only good Monday-Thurs. for 10 days, and 4 dinner buffets M, W, Thurs, Sunday.
We're kind of sick of the Palms buffet after eating 4 times in the past week. Unfortunately coupons can only be used with or by the person named on the coupons, so I think these will go to waste.