When was that? They had naming rights to a Major League Baseball & football stadium from ‘97 to 2017. Maybe good for recruitment but seemingly pointless on the consumer side to maintain the contract:
>Also in 1997, the facility was renamed Qualcomm Stadium after Qualcomm Corporation paid $18 million for the naming rights.[8] The naming rights belonged to Qualcomm until 2017, after which the rights were purchased by San Diego County Credit Union.
Surprisingly cheap! Not that I think it is a good use of money, but less ostentatious than I expected.
Pretty sure most sponsors would include an exit clause just in case. Sure there would be penalties, but if the stadium can re-lease for more, they should play ball.
https://en.m.wikipedia.org/wiki/San_Diego_Stadium
But I get it that in sports, sometimes the big cheques are written because you can.