Sure ,,,, the prize money comes from sponsors rather than the IFBB itself.
But those sponsors pay the IFBB to be so called sponsored abut the IFBB cuts the checks to the winners.
I think we have an agreement here ... but we are both saying the same thing in different ways.
The sponsors pay the IFBB to be sponsors  and the exhibitors pay the IFBB to be exhibitors . eyc., etc .... and the IFBB uses those funds to pay  for everything connected with he promotion of the contest and the hundred of thousands to pay the winners.
At least ... that's the way I see it.