This past trip, begining of Dec, my wife hit the pin trading hard. She decided on one collection she wanted to shoot to finish and would pick up those as well as anything that caught her eyes.
At some locations it was just a 'look at my board take what you want' while other locations were much more engaging. We had one fantastic experience at the French quarter gift shop were at the end of the trip my wife mentioned she was one pin away and this cast member dug through everything they had to help her. She didn't have it but just the fact that she was willing to do that and approached us the next day to apologize meant a lot to my wife.
So yeah it's hit or miss and I feel its like a lot of things in life, the energy you bring to it will probably be matched.