@feditips The example you sent looks very nice. I haven't scrolled all the way through it, but it seems fine.
What I was referring to were profiles (many I've encountered, but I can gather up specific examples if you need them - let me know) that have moved from other instances. Such profiles have the link "Browse more from the other profile" at the bottom of their feeds. When I click on that link, it opens a new window, I am not logged in in that window, it won't let me log in, etc.