This still happens in Australia too. The primary reason to do it this way is that you don’t need a person standing there all day to sell items. A working farm c

This still happens in Australia too. The primary reason to do it this way is that you don’t need a person standing there all day to sell items. A working farm cannot spare a person full time. I imagine that farms stop the practice when it’s no longer profitable due to dishonesty and theft. It’s only a small secondary source of income in any case. The main income is wholesale anyway.