BC based its decision totally on money to go south to the ACC.
Lash, none of us really know this. What we do know is that BC hitched its wagon to its perceived rivalry with Miami & that Miami wanted BC because it likes the idea of having exposure in the Northeast for its alumni & potential future recruits.
We also know that BC questioned the stability of the Big East & its long term viability to hold an automatic BCS bid. They were not unique in holding these concerns.
What my be moxt incisive to BC's motives were statements by its president that BC desired exposure in the South - especially in big metropolitan areas like Atlanta. Many of BC's traditional applicants come from families that have moved with their corporate jobs to Southern cities like Atlanta, Charlotte, & the like. BC is a Catholic school & its president saw the increasing Catholic population in these areas - especially among upper middle income families who can pay BC's tuition. Bottom line is that in these comments the BC president saw the move to the ACC primarily as an academic recruiting tool.
Of interest to this issue of the value of ACC- membership as a PR tool in academic recruiting is the fact that BC receives the highest number of applications of any Catholic college or university in the country - by far! They routinely attract well over 20,000 applications (recently, 22-23,000). Georgetwoen is second among Catholic universites at about 15,000 & Notre Dame third 11-12,000. In the past 20 years, BC has successfully developed itself into one of the most highly successful universities of any kind in the country. Their academic profile is Tier I. This is a very high priority for them. So, the comments of its president are very credible to me.
As one who paid 4 years of tuition at BC, I was very bitter about their move to the ACC, but I don't know that money was the primary motive. It certainly was not the only factor.