What does the return on a possible Accam transfer look like?

I do not believe I'm alone in finding it difficult to navigate the convoluted rules and regulations of MLS personnel movement so I'm throwing this question out there rather than attempt to research.

Does Accam's increased performance this season and correlating rise in value benefit the Fire as a seller, or Major League Soccer?

In Europe it would seem to be more clear cut; a player improves and the club sets a higher transfer fee that the purchasing club has to meet. In the case of MLS, I'm curious if that fee goes into the Fire's coffers or the league's? And in what form, hard dollars or TAM/GAM funny money?