There is no upside for ND to agree to this. If they were highly ranked there would mostly only be downside to the game unless randomly another team were a top 10 team. This really provides nothing to them, likely does not help SOS and in most years when they are not a playoff team does not help them to another bowl game. If they wanted a playoff game and needed the additional game just join the ACC and they would get that access.
It may work with the other indy teams, but I cannot see ND wanting to be lumped with this crew (Houston, UCF?). The indy teams mentioned should tie a bowl game to this if they do it, but I never see it happening.