Everyone gets the concierge call. It is mainly to get you to buy a day trip or activity somewhere.
We really appreciated the two $10 coupons per day and found if you go over to the coffee shop that is out by the lagoon / dolphin area, they have a decent breakfast sandwich for about 4 bucks. The grocery store in Waikoloa has a great selection of low priced deli items, liquor, or anything else that we stocked up on and brought back to our room. Or it's a short walk down to the King's shops where there are plenty of cheap eats.
I don't typically go on a vacation to scrimp and save, but when you see a full breakfast a the motel go for 25 bucks, I feel ripped off and will go elsewhere.