Guides are being published on how to virtually purchase various online products or currencies, including one specifically focused on buying Book.io. The guides appear to be part of a series or collection, with some outlets referencing a primer or introduction to the topic. It is unclear if the guides are related to a specific university or platform, as some headlines mention Kabul University while others reference different products or names, such as Aethir, Parcl, RedStone, and Nillion.