I'm using Send Jim as of a few months ago and I too have seen zero return on the spend. I was doing what you were doing -- sending to neighbors nearby jobs we just completed.
Just recently I decided I should shift gears and use the spend for something else. Instead of cold marketing for neighbors, I've decided I'm going to write hand-written cards to past clients that we worked with a year ago. I'm just starting this week so I'll keep you posted to let you know how it goes!
I also started sending out cookies, nuts or snacks to clients who have recently had a baby or something like that. I think these sweet touches will pay off more than the cold marketing, but that's just my hypothesis.
