1. Dates and locations were agreed upon, however details were never worked out and a contract never got signed for reasons we don't know. Now after 3 NDSU championships UND wants the same deal that was discussed 3 years ago. The business climate of NDSU football has dramatically changed since those discussions took place. Try getting season tickets. Unless you've got a dozen wells pumping around Parshall, good luck.
2. Weber State wasn't an ideal deal for NDSU. A twelve game season, dates that worked out, combined with the home and home Weber State did when NDSU was an FCS nobody got that deal done. At the moment, NDSU has a lot of motivation to get home games on their schedule. Sometimes a match can't be found and NDSU may end up doing a home and home. Ideally if a home and home series is signed hopefully it's a perennial playoff team. Just because a deal with Weber State was worked out doesn't mean UND is entitled to the same deal.
GT offered a 2 game series both games in Fargo for a 175k to 195k guarantee. UND averaged 8500 fans last season. Add in the expense say of 150k to bring in an opponent, I'd be shocked if UND nets more than 100k for an OOC game.
GT offered a lucrative deal for both institutions.
UND has more to gain by renewing the rivalry.
IMO, BF doesn't want the rivalry.