Concur. YP, like many paper services are circling the drain at this point. I built my business with them, but the ROI went from an easy 600-800% in the early years to about 85% (lost money) last year. I cut my ads in half and will undoubtedly cancel this fall when renewal time comes around.
I still get calls from older folks who rely on print, but even those are diminishing. This ship has definitely sailed.
I also spent a year on their online service - if I recall it cost me $100/mo and I didn't get a single (!) call from it.