Because there's no business in Twitter. There's no path to being in the black and there never has been.
> The company ended its most recently reported quarter with $3.5 billion in cash and investments, says S&P Capital IQ. If the company only burns $8.5 million a year in free cash — as it did the past 12 months — that's enough cash to last 412 years.
http://www.usatoday.com/story/money/markets/2016/01/25/twitt...