Content deals with Facebook, partnerships, and innovative AI-automated video creation help Whisper outlast the competition.The last few years have been tough for anonymous social networks. Yik Yak, the popular collegiate bulletin board once valued at $400 million, recently sold its engineering team to Square for less than $3 million and shut down. Confessional site Secret went belly-up in 2015. But Whisper, a Los Angeles-based company backed by approximately $70 million in venture capital, is soldiering on.Read Full Story