Twitter's timeline changes do little to solve core challenges

Twitter is running out of time to turn its floundering business around. The company had a terrible quarter to close out 2015, and no reason exists to think its situation will change anytime soon. It lost 2 million monthly active users (MAU), including 1 million MAU in the United States, during the fourth quarter of 2015. And if the downward spiral continues, Twitter could celebrate its 10th birthday next month with fewer users than it had a year before. This notable loss of users comes at a