Understand, being curious is one thing. Asking a Master skinner a question like that is close to personal. The answers you did get are about as far as some might be willing to go. A better question would be is how they got started or what inspires them to do what they do. At 17 you shouldn't be concerned about making money as a skinner, not that your are but it sounds that way. I'm not a master, only an apprentice. Why don't you try your hand at skinning if you haven't already done so. Perhaps then you'd get a better feel for what others have said.
I don't really see how it would be personal, it wouldn't be for me at least (and yes i've done some skinning in the past), and asking what inspires you would be far more personal for me than some of my skins rough download count. It just feels like people are making a way too big deal out of a simple question. But of course no-one is required to answer.
Also no i'm not that concerned about making money out of skinning yet, even if I was I wouldn't really imagine living off of releasing master skins on WC