Okay I am going to be the smartass who says Or you could just buy 1 game for 75% off everywhere else.
I realize they are the Nordstrom of digital download stores (just hum to yourself while shopping there and pretend it's piano music) but a number of those games have been sub 40% by themselves at other outlets.
I'm currently online buying stuff, and their system seems a bit glitchy. There seems to be a discount when buying multiple items, though the percentages off do not make sense.