Twitter announced Q4 2015 ad revenues on Wednesday that show, not counting SMS Fast Followers, monthly active users declined from 307 million in Q3 to 305 million in Q4. Year-over-year, this represents only a 6% increase. The company also reported a Q4 revenue of $710 million — a year-over-year increase of 48%. Overall in 2015, Twitter’s revenues exceeded $2.2 billion. Ad engagement is up 153% which SocialTimes.com says is "no small feat." In addition, Twitter said it now has more than 130,000 active advertisers, a 90% year-over-year jump.