It appears from the photo that this is a double green for one hole, rather than two greens connected, which is either a gimmick, if done any time after St. Andrews, or not, if done at the home of golf.
The double could have strategic value, but I can't tell from the photo. I am considering one right now (but the owner is dubious) where you can only hit the left portion of the green from the right fairway, and the right from the left is more advantageous.
It could also serve the purpose of making a resort course play differently on consecutive days, which may entice a stayover to play again. In any case, variety in play is never a bad thing, really, is it? That also entered my mind in proposing the double green.
So, a gimmick? Yes, probably. Is that a bad thing? What if we called it a "conversation peice" a la the sixth at Riviera?