I was reading on mousesavers that if you purchase a 1-day PH ticket at a discounted price, that price would be credited if you decided to upgrade to a 3-day PH ticket, not the full price of a 1-day ticket. So, what if you buy a 1-day PH ticket through a charity auction? Is that ticket able to be upgraded? How do they know how much to credit towards the price of a 3-day PH? Hoping some of you SUPER DL EXPERTS can help me out on this one!
