Apple was on the brink of bankruptcy over a decade ago but has since reinvented itself through innovation. The company's competitive advantages come from welcoming user-created products to sell to other users. Millions of iPod owners have inspired over 500 accessory companies, generating an estimated $300 million to $6 billion "iPod economy". Popular accessories range from $10 speakers to $1,500 designer bags that expand Apple's reach in technology, business, and entertainment.