I started reading fanfic some time ago and have since followed people who have gone from fanfic to publishing their own work (under different names of course)
I've actually got the story Redemption both in the Supernatural Fanfic version and the published non-fanfic version.
Maybe I am the exception to the rule but I tend to think that if someone has the balls to write a story and then change the names (probably for legal reason) I have no problem with it.
To be honest I didn't realise that people paid for artwork!!!!
M