How is ebay not making money? They are a glorified e-commerce site that does a huge amount of business, taking a cut of each transaction with very low per-transaction cost.
Well on the home page right now ebay is offering a 20% off coupon for products that they don't directly sell, and $100 for $90 in gift cards. Ebay takes a big cut but it's not 20% big, so they're probably losing money to acquire customers through deals.