Pandora (P) shares got crushed after reporting quarterly earnings. The stock is now down to $15 per share, a staggering decline consider the stock was at $40 per share at its 52-week high. This is confusing, because streaming music is still popular among consumers. Pandora’s revenue grew 44% last year, and it now has 81.5 million active listeners, up 7% from the fourth quarter of 2013. One major problem is that Pandora is still struggling to consistently turn a profit. Despite its impressive sales growth, the company lost $0.15 per share last year. This is because Pandora has to spend increasing amounts of money to procure its sales growth.