I've
improved on my model for the loosening effect of rakefree/contributed-rakeback vs raked/dealt-rakeback.
I came up with the same results as my first, rougher, model. A surprisingly large loosening effect going from 17% of hands played to 24%.
I again welcome reasoned criticism of the model over there.
I believe I've soundly demonstrated that moving to contributed rakeback will loosen the games significantly. The thinking tight players will open their range to pursue the extra money in the pot. The loose players will get more money in their rolls and play more.
Together these effects will help move the games at WPEX towards the fun atmosphere of a home game.