I wouldn't see how that would be another Sponsor's fault if others committed to SBI and did not pay their share. The contract was not with the other Sponsors, it was with SBI.
$150,000 was only the 1st payment.
Another $150,000 was to be paid by Geico after the 1st race was aired on CBS Sports.
Obviously none of the races made it to CBS Sports leaving the Miss Gieco Racing team to answer to their number one Sponsor "GEICO" as to why there was nothing on TV as promised.....
GEICO "The Company & Sponsor" filed the suit to retrieve their $150,000 plus.