The Six-Hour Memorized Deck, p. 70
While not scintifically proven, testimonies on Internet show that some stacks have a higher retention period than others, meaning they stay longer in someone's memory.The retention period might also be related to the memorization method.
To keep charges as low as possible, orders are shipped via the surface postal service (small orders in bubble envelopes, large orders in carton boxes).
New rates of the postal service forced us to modify our shipping charges. Low and heavy weight parcels now cost less to ship. Unfortunately, medium weight parcels took the hit. To better serve our customers, we took half the augmentation on our shoulders.
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