Pay content PPC? Was it advertised with AdWords? I thought he said he typed it in. Most parking programs prohibit sending PPC traffic (although of course, lots of them get through anyway, as we've all seen)
I have a client with "supplies" in his domain name(s), and most of the supply versions are parked. I was pretty ticked about finding my ads for the client on those pages, but then when I looked further, we've gotten conversions off those sites.