I actually think for purposes of property-specific offers, as long as you have enough play at a given MGM property to get
any offer from them, the offers you get from that property will reflect your entire ADT.
This came up maybe a couple of years ago and one of the members here said it was something like 10% of your play would trigger a property-specific offer.
So I think of an example where you are staying at
Aria on an offer for 3 nights, and you go down to
MGM Grand and play for 1/2 a day. Your MGM ADT by itself is going to be small. But I think you will start getting offers from
MGM Grand, and I think they'll be based on your entire ADT for the trip. And if you were getting offers from
Aria already, they would continue, and at the same level, as long as your overall ADT for the stay was the same.
I think the place where spreading your play around across MGM properties would be disadvantageous would be when it came to getting back end comps at your home property.