Silking is pretty straightforward because the NPC's are pumping the money into the game. I doubt people can afford to pay you more than 30k/hr from their own money, at least not just yet.
Nah, it's about the same as silk, but less exp. Although I preferred this because I could autoclick longer without worrying, you're rarely caught here if you know where to position yourself. Respawn time is about 2x of silk, x1.5 exp.