Amazon and $$$
We sell maybe 30-50 copies through Am,azon, sometimes more (like CSIO), but it clearly is no indication of success. If you are actually in this for money, as FD James already said, you are in the wrong business. I am willing to bet no more than 5-6 folks in the d20 industry actually work it as a full time job and are able to afford not to eat cat food. We make (as a whole enterprise) maybe a half what I do at my day job each year, and I bet we outsell almost everyone (well, Monte, Chris and Matt likely beat us) in the d20 arena.
If you need 16 grand to get hitched, you would be a lot better off gettinmg a second job and bagging this. If you want to publish cool stuff and have a presence in the gamer world (that's why we do it...Clark and I are geeks to the core!), then d20 is for you.
The lack of profit in this industry is beyond belief. Too many cooks in the kitchen, too many distributors and overstocked retaliers, and not nearly enough gamers who buy things. Its a fun hobby job, but I have definitely gotten more free books, dungeon sets and buildings than i have paychecks after almost 5 years.
Good, lucky (emphasis on lucky) writers MIGHT make 3 grand on a huge book. Someone w/ a huge name (like Monter) might do a little better. In general, unless you are part of a big publishing house, like WW, GR or Mongoose, your books will almost never hit the shelves in most stores. Four years ago was a bit different, but sadly thats the way it is now.
Bill Webb
Necromancer games