Former Twitter engineer, Leslie Miley, believes that his former company is stuck at 320 million users because it doesn’t have people making product decisions who understand the most prolific communities on Twitter. Miley believes that by failing to add more African-Americans, Hispanics and women to its engineering team, Twitter is ignoring the segments of its user base that are the most active. Although Twitter does not release the demographics of its user base, a 2014 Pew Research Center survey found that 27 percent of African-American Internet users use Twitter, compared to 21 percent of non-Hispanic whites. Hispanics are also heavy users of Twitter, with 25 percent of Hispanic Internet users saying they use the service. Click here to read more.