From a cursory glance at your comment history, it doesn’t appear that you have been (shadow) banned. When you say your “posts are not showing up”, are you refe

From a cursory glance at your comment history, it doesn’t appear that you have been (shadow) banned. When you say your “posts are not showing up”, are you referring to your comments or your article submissions? If it is the latter, showing up on the front page is more about luck, time of day and a host of other factors than about submission title alone.