Even though Twitter apparently doesn't make much money, the new internet company has had a more than 10x increase in visitors in just a year. They are in the process of getting a 100 million dollar loan, apparently to "make a business plan". How did a company without a business/marketing plan grow to be worth 1 Billion dollars?

Twitter Inc. is nearing a deal for as much as $100 million in new funding that would buy the fast-growing Internet-messaging company more time to figure out its business model, according to people familiar with the situation.