Every serious business will prioritize a customer that brings in a lot of money over a customer than brings in very little money. You should do right by both, y

Every serious business will prioritize a customer that brings in a lot of money over a customer than brings in very little money. You should do right by both, yes, because it's the right thing to do, and small customers turn in to big customers so it also makes business sense. But you don't just leave a big customer hanging for days or weeks, because they might get annoyed with you and go to $competitor which will seriously impact you. No serious business treats their big customers that, and it's a sign of dysfunction if they do.