The Big Ten has been flush with money for years now thanks to the Big Ten Network, and is the biggest appealing point for the conference for prospective schools. The expansion of the Big Ten has also mostly been targeted to increase the television footprint as well, with Maryland bringing in Baltimore and partially D.C. and Rutgers bringing in New Jersey and allegedly NYC (nobody really cares there, but the Big Ten will pretend that they do until the end of days). Future expansions will likely be done in an attempt to further broaden the TV market and make even more dough, so I wouldn't be surprised to eventually see the Big Ten make a move at some combo of North Carolina, Virginia, and/or George Tech in that vein as well. Maryland especially praised the move to the Big Ten thanks to the huge influx of cash it brought in, saving likely multiple programs, in response to understandable fan backlash for losing rivalries.
That being said, I'm still of the opinion that the Big Ten messed up when they didn't make a move on Mizzou or Syracuse (which would've been a better fit and market expansion for New York than Rutgers) for these same reasons.