Who exactly is getting behind using a closed-source service where a main developer can't understand the benefits of end-to-encryption, nor how it actually works

Who exactly is getting behind using a closed-source service where a main developer can't understand the benefits of end-to-encryption, nor how it actually works? -> https://www.reddit.com/r/Android/comments/3bplym/hey_randroid_pb_dev_here_lets_talk_about_endtoend/ https://www.reddit.com/r/Android/comments/3bplym/hey_randroi... Same as WhatsApp+Axolotl. Is it implemented properly? Is it flawed on purpose? iMessage? What's stopping Apple from simply inserting new keys? They completely control the infrastructure and implementation. Both a very big false sense of security, as is PushBullet's E2E.