People use the excuse that it takes bigger/better opponents to sell tickets get butts in seats. This tells me people are their to see another program play, rather than show up and support their own team no matter who their playing.
It has everything to do with the quality of the event. Alabama can get 90k for Ga Southern because a) Every Ga Southern fan in existence is going to have an interest in attending, and b) Alabama fans who can't sniff tickets otherwise will jump at the chance to attend even against a tomato can opponent just to go.
Teams like Stony Brook don't do that nor does UConn have a backlog of fans who can't normally find tickets. So, yeah the opponent matters to UConn's home attendance.
When we joined the BE, it was a real honest to goodness power conference despite Miami, VT, and BC bailing. The early success and sheer newness of top level competition maintained the level of attendance. The death of the BE and the PP era has completely destroyed all of that, again completely. There is nothing to sell except hope in a new regime, which any sane person can see is limited to winning the AAC and hopefully getting a BCS game. While that is not all that different than the preceding decade, it's not guaranteed and the interim games against these fellow P5 cast offs isn't going to cut it. I'm happy for everyone who looks at the Yankee Conference days warmly and thinks all this will be good enough for people to want to support it. It isn't. It wasn't then and it isn't now.
SB was a scheduled win to make bowl eligibility easier, mission accomplished. Just don't expect close to full houses anymore for these kinds of game. BSU will be an interesting test. They are not P5 and shouldn't draw like they would have few years ago, but they are a known name and should be a better draw than BYU now that the season is in full swing. I'm more worried about the attendance at conference games because we have to play those every other year. If you can get a big team to come to the Rent it will sell, for a while anyway, but this has been the most depressing 3 out of 4 home winning run in program history.