Did a little checking. How many centers above 150k/wk on the market right now are free agents? 0 out of 66. So while there might possibly be some tenuous link between free agents and plethora of expensive big men, I don't see it. It is because centers are easiest to train, and your average internet user likes easy things. Besides which, he doesn't understand about cost-effectiveness, just that a guy with three gold or green skills is gonna whip ass in his d.3 league. Then when the salary update comes around he sees that he can't afford that guy anymore so he sells him and starts another.
Once I scored a basket that still makes me laugh.