Well, those plumbing companies pay the Sox to be sponsors. I don't think you want SU paying ND to be aligned with them
ND can remain independent in football, where they already have a dedicated streaming service called Peacock. Its financially and logistically advantageous for them to be in a conference for their other sports, and they'll never suffer from a lack of suitors on that front.
Like I mentioned a week or 2 ago, ND is basically outside the conversation of conference issues at this point. Their path is pretty well set.