Odessa, Odessa,
If we only think in terms of "the Vegas industry" a betting exchange such as Matchbook would not exist!
If Matchbook wants to remain on the cutting edge of offshore wagering, offering 2H Live Betting, based on the already posted halftime offerings, would be innovative
. . . and especially well received for lopsided first half games!
(Other than a Home Page announcement, it would simply require that MB add a "green ball" Live Betting icon to the halftime numbers indicating that the runner(s) would continue to be available to trade during the 2H.)