Unless they draw furry porn on commission. I know this completely straight (and non-furry) chick that's made a name for herself in certain furry circles. Get's payed upwards of $300 bucks per drawings that take a few hours each, plus colouring.
Being willing to draw just about any fetish helps. She said one of the only orders she refused was for a a pic of a a father (fox, i think) having intercourse with a cub/pup/baby that was STILL COMING OUT OF THE MOTHER'S WOMB. Short of that though, she'll do just about anything, and get's paid well for it.
She thinks her customers are sick fucks, but they pay well.