For the woman above, these were her competition across the street.
The guide carried a bag of candies as well as small coins which he distributed to every stretched-out hand. Also all along the way he bought fresh food from people he knew to pass out to other people he knew and especially to give to anyone who did us a favor.
Always having snacks on hand, I tried this a few times when I was by myself, offering to share food with folks who had gone out of their way for me, and always the offer was accepted with kind enthusiasm and led to my only successful attempts to communicate in Spanish. There must be more to this than I know!