I politely listened for a few minutes and told them I was a member of the Church of Scotland so not really interested. Hopefully they'll take the hint.
They used to have to put a handwritten form in every month showing how many hours they had spent "preaching" that month. 10 hours per person (what they call publishers) is the target.
The form also had slots for them to report how many magazines/booklets they had left with people.......each magazine was called a 'placement'
The written form is no longer obliged so they can relax a bit but the longer they can spend at your door means they need to spend less time at other doors.