They put expensive pricing out so that the items covering 90% of their userbase look more appealing. Pricing 101. Look at any free to play game where you can buy in-game currency.
I've started to notice this sometimes. I kinda laugh it off but am actually terrified about how much thought I give to figuring out the optimal bargain offer for something I had zero need for.
[poor man's offer] [crap offer] [real offer] [expensive crap offer]