Wouldn't it be neat to see all these converts as little points on a map? You'd see one dot pop up, and then a bunch of new dots around it. It's an epidemic of sorts.
I wonder if they notice such things over the course of packing orders and shipping packages. Like, one day, you send one package to Middle-of-Nowhere Pennsylvania, and two weeks later, you're sending packages to seven separate addresses in Middle-of-Nowhere Pennsylvania. Setting up franchises!