You're right, when I did my first photo walk, there was much more media coverage. For the last two years I was reminded by some friends, otherwise I might have missed the event myself, too ...
I did all my Festival of Lights shots with a tripod. It was funny to see many other photographers walking the streets of Berlin with their tripods. The 'Guardians of Time' figures were almost surrounded by tripods
It looks like they took
this picture of a swimming elephant for the illumination. They changed the picture every few minutes, going through a set of maybe 10 or so pictures with totally different content - some photographs, modern art, a house facade, ...