It's not laid on by the electoral commission, but by the people who work at the polling place when there isn't an election on. No one obliges them to put on a bbq, they self-organise it. Perhaps the person who usually organises the BBQ was sick this year? Perhaps they retired? Perhaps they moved?
Whatever happened at the polling place I attended, the
democracy sausage tracker shows there were lots of snacking voters and funds raised by polling places. Polling places are schools, churches, community centres, anything walking distance within suburbs. I don't know what rural people do- postal votes maybe. My brother voted early on Tuesday in a community library because he had to work yesterday.