Americans are fascinated by their own love of shopping. This does not make them unique. It's just that they have more to buy than most other people on the planet. And it's also an affirmation of faith in their country.
"Ahu" are stone platforms on which many moai sit. There are 313 known ahu and 125 of these carry moai. The biggest, Ahu Tongariki is 220 m (720 ft), and had the most (15) and tallest moai.