According to your screenshot you are inside an article, on the last slide. So that's not how it greets you on the actual website. Did you go to this url: https://www.useronboard.com/?
I visited the site, clicked on Apple Music, then a lot of images flickered around and the popup appeared. If I do it again now, it shows me a "like us on twitter" popup instead.
Do you use NoScript? I just tried with that and I experience the same as you describe.
I block third-party javascript of course. The popup's scripts worked fine.