I had no idea about the circus visiting the Vatican and thought it was notable because I didn’t think others knew that either. The Daily Mail article says a circus has been coming every few weeks under Francis. It’s hard to understand, too, professed Christian leaders bringing in circuses, especially with Christians being persecuted in other places. Many churches in the West do things like this.
The circus has been coming for years, I remember it in John Paul’s time. They usually do it around New Year’s/Epiphany. I rather doubt that it is a cover for child sex trafficking, usually performers are family groups.