whazitdoinnow,
if you're making money (getting paid) in your endeveour, guess what (?), you're a commercial pilot.
the regs make no differetiation on whether there are warm bodies in the back or card board boxes---"is the airplane making money?" is the big issue (plus, boxes don't bitch about a less-that-perfect touchdown).
cargo pilots ARE commercial pilots.
I've flown many a multi-millionaire around the world in his fancy PRIVATE jet, still acting as a commercial pilot...