Sneaker consumerism is often overlooked. Here is insider information on how big the sneaker industry is, how lucrative the re-selling market is, and how dangerous sneaker releases can get. "Sneaker-heads" around are having trouble with fact that Nike continues to sell out on most releases. Nike is known for being the biggest leader in the sneaker industry. Last year's Nike revenue marked the biggest in its history. When Nike sneaker releases sellout, it increases the shoes value, that triggers the re-selling. On some occasions releases get violent.