Apparently Sacramento's new ownership agreed to limit how much they take from the revenue-sharing agreement in the short run, and give it up completely once they move into new arena, a potentially huge financial upside for many of the current owners (although once the franchise moved to Seattle, they probably would have paid into the revenue-sharing rather than take from it)...so money had a lot to do with it...
http://www.sbnation.com/nba/2013/5/6...vivek-ranadive