I think your post hits the nail on the head. Free Agent acquisition and subsequent resale has been a cash cow for teams with the startup capital to get involved. Since only players with a salary of $xxxxx were listed, low level teams could not take part, thus allowing another avenue for rich to get richer.
I would be really interested to see a mean, median, and mode of the bank accounts of all 50000+ teams in BB.
Once I scored a basket that still makes me laugh.