I can't believe anyone would do one of these:
http://www.sitepoint.com/forums/showthread.php?t=327226 (don't click if easily offended, mild content warning)
It's just a little bit of fun for me and the entrants - not all about the money. I think at the end of the day it's down to personal choice and quality. For example, I have to deal with people writing 500 word articles for $5 but I don't mind too much as I know mine are far better quality.