Link below:
Nevada paid Kansas $300K for a Home and Home series.
SMU Paid Nevada $450K to play @Reno (There has to be more to the story.)
Anyway, long story short. . . I don't know if you were implying that there is no money involved with Home and Home series, which is not true. The two teams can agree on any contract they want.
Here is another contract with BYU/Virginia where Virginia paid BYU for a 2 for 1, 2 in Provo. (But this was likely due to Bronco's buyout fee being waived)