Thomas Shey
Legend
The "things that aren't D&D" space is infinite.
That doesn't mean the market for such things is, however, and remember again we're not talking about the typical one-man-band RPG company here. If I've got a little cash and the knowledge I can write my fantasy heartbreaker, hire an artist and publish it and if it only sells a couple hundred copies, the money I've lost is still relatively trivial. Paizo is in a different space there.