@Gargron@nnscott@waltmossberg It happened to me multiple times when someone add a link to another post on another instance inside his own post (as a workaround to quote someone else toot). when you click the link (or the preview) you are sent to the original poster website that can be another instance. There you get the banner if you want to interact with him. I have to admit I was a bit surprised by that at the begining.