It is an amazing difference, in so short a time. From the early eighties I was a JW street preacher, before it was encouraged very much by the WT/JW Org.
I preferred it to door knocking, no Not Homes ! and you could pick who you wanted to talk to. I always used mainly the Bible, but would offer Magazines etc, "placing" more of these than most in my Congregation.
The Cart guys and gals are pathetic in contrast to the street preachers of my day, it simply is a way to fill time. One of my old pals in the street work now mans a cart, with little interest being shown as far as I can see, I bet he is frustrated.