Well, not to barge in here, but talking to guys in my league, interest is on the wane.
We've already lost a bunch of managers in our league, which used to be one of the "premier" leagues on the service (iRacing Lunch Time League), and we're looking at losing even more because the system has stagnated.
It's a vicious circle, because iGP can't progress without capital, but those of us subscribing are losing our drive to contribute that capital the way things stand. It's no reflection on Jack because we all know the context and the challenges he's had to deal with trying to bring iGP back from life support. It's just that it's an expensive game, and paying the same prices to deal with the same bugs year after year gets tiresome.