Interestingly, only some of my posts have disappeared. One of my posts was there this morning and then vanished (not available on steemit or steempeak if you look at All Posts). I can find it using a direct link on steempeak (and I can see it on Dtube) but it is not available at all on steemit. Not sure if it was because it went over a certain payout threshold (another one of my posts disappeared last week, about the same payout level).