It was meant to be theoretical in general. Second half betting before the game starts seems to me to be something very few bettors would do although at least CRIS and Trojan offer it, probably some others also. Ability to bet H2 during B5th seems to me would draw more action, but only at CRIS ( to my knowledge), since Pinny wimped out.
I wound up taking only H1 over 5.5 -106.
Thanks for the input, it is something that caught my eye, and I was wondering what could be attempted with this unusual option. It must be hard to put a line on it, so possibly exploitable ?