This led to the creation of the Japanese "Marty's Law" (マーティーの法則, Mātī no Hōsoku): if you don't keep offering something to sell, you can't increase sales.
后来日本有所谓的“Marty法则”(マーティーの法則): 你不持续支持一个产品的话，就无法提高其销量。