Blind boxes (also called mystery boxes, gift boxes, or opaque boxes) are relatively recent concepts by retailers such as Birchbox and Stichfix. The distinguishing feature of a blind box is that its content remains uncertain until the customer purchases the box and opens it. This paper examines a...

In the mobile video games industry, in-app purchases are a major source of revenue. A common in-app purchase is for additional "moves" or "time" in puzzle games. We call these in-app purchases "bonus actions". In some games, bonus actions can only be purchased in advance of attempting a level of...