Mark Glaser (@mediatwit) is the executive editor of PBS MediaShift and also the host of 5Across. MediaShift serves as the guide to the future of the digital media revolution. Over the years, I’ve followed Glaser’s work closely. His astute observation and poignant sense of distillation and direction help his readers and viewers understand change and evolution to make more informed decisions. Recently, we discussed the landscape, market, opportunity and pitfalls, and psychology associated with sponsored tweets, paid posts, disclosure and…