As long as members think that they'll find interested ones in the territory, the door-to-door practice won't go away.
The "field ministry" is the single identifiable characteristic that makes Jehovah's Witnesses unique. For the baptized JW, going out in service is a lifelong commitment. The form will change - this organization prides itself on change.
What a better way to get individuals to stand up for their faith than by putting them next to a cart or table in a highly visible public area.
If you don't have much money to give they want your time. People with limited incomes gladly trade hours and hours of service instead of 20.00 a month. If you have money, you just write a nice monthly check and you can skip service guilt free. And the elders won't give you any crap about low hours.
ginger