I think fans have a tendency to write off the international aspirations/ideas as ridiculous before even getting any details. It's easy for people to say, "Why would Europeans care about two random colleges from middle of the U.S. playing each other?" But I think you could equally ask, "Why would people in the U.K. care about the Jacksonville Jaguars?" And yet, the Jaguars have played a bunch of games over there, and their attendance has been as good as any other team's international games.
One potential positive for the Big 12 being the first mover in the international space for college is that the perceptions, stereotypes, or comparisons of one conference vs. another or certain schools vs. others wouldn't exist in the same way anywhere else as they do among U.S. fans. If people from other countries are going to start following or become fans of U.S. college teams, they'll probably become fans of whoever plays there consistently first, and not just become fans of whichever teams ESPN covers more or have better history in football or basketball.