Recently I've been almost pushed by a friend to start exchanging shares of videos. I didnt expect much if anything as result of that, since I knew the practice of sharing posts and since some years it wasnt giving great the results. I manage a humor Facebook page with 1,8M likes, she has 2,2M of a romance related page (still both falls in the broader logic category of "entertainment" in some sense) . The reach of the page jumped from 2M daily to 4M-5M for 3 weeks. Then it went down to 3M but still a great boost. I think looking for a group of admins to share posts of similar content is good for activating and growing pages, similar to the collaborations Youtubers do.