Facebook Tests Replacing 'Share' with 'Message' Option on News Feed Posts
Facebook looks to be testing a new post format which would replace the current 'Share' button with a 'Message' prompt.
4 Aug 2018 ... Facebook is testing replacing the Share button with a Message ... What you post on social media stays forever, and can be seen by ... a focus on private, disappearing messages that couldn't be pinned to your public record.