I doubt there would be a two tier time-based pricing system for a Play Off semi-final with tickets on sale for just a week or so. I may be wrong, of course, but doesn’t ‘this kind of match’ just have the one ticket price (concessions excepting) per each relevant area of the ground?
Not sure, I was just explaining a potential reason why clubs like to get the money in as soon as possible, which is why they price regular matches in that way. Not just SUFC of course, virtually every professional club does this now.