Both, mostly - as well as the IAAF. But they will wake up to things soon. The consequences for the downscaling of fees for the minor players in the field will be an afterthought I suspect, but maybe I’m just naive and the IAAF are much more devious in their funding strategies.
Bottom line anyway is: You got No. 1 and No. 2 in history, the camera will concentrate on them and the other lanes will be out of focus anyway. The other lanes might be filled by locals heroes in whichever country the Diamond League meets are conducted.
Wonder how Asafa Powell must feel after being sidelined in negotiations.
Still, it only takes one great run and Powell or whomever can write themselves (back) into the picture.