What I got from her point is that a platform can change the rules for the people using it -- and Amazon has sure done that over the years. Recent changes for Kindle books hit some authors and publishers hard, really reducing their income. But it has helped other authors. And the Facebook changes that reduced exposure of posts really affected people's connections to their followers and friends there, so folks had to change what they do or move to other platforms, too. It is nice to have stable platforms out there, but their stability is not our stability (unless we are stockholders, I guess). PS: I liked seeing your image with your comment.