So it was a video played at the KH. It showed carts outside The Shard and she says it was around 200 or 300 in two hours, several carts.
She also said there were 500 out in Amsterdam with the carts and thousands were being placed, even one woman stopping a tram to get a mag or book. Brothers having to go back and get more literature.
Hard to know what to believe, but she said from that video you can see how the carts are really being utilized now. But I've seen them around my city and in towns while visiting, and seen nobody taking them.