I interviewed the founders of Purple, Rebecca and David, on The Chat Bubble podcast. http://thechatbubble.com/2017/02/episode-7-purple-founders-rebecca-and-david/
If you don’t know Purple, they send 1 or 2 daily messages with political news headlines. The user can respond back to get deeper into the story.
Purple started with non-partisan election news (purple=red+blue) and they haven’t slowed down a bit since the election ended. Today, once you message in, Purple will send you a daily message with the most important political news.
The genius is that once you sign up for Purple, you no longer need to worry about headlines and clickbait on the desktop. You can be confident that if there is something you need to know, Purple will tell you.
Anyway, the podcast is a great conversation with a Messenger campaign that really stands out.