Pocket secretaries and ebooks in the game (that only seem to contain one email/article per ebook) are told to be extremely cheap and are obviously used by the designers to as interactive media that share the same purpose as datacubes in the series.
Though it concerns me, if they in story canon are hardware that contain 1 email/article, what is the point of buying them?
In comparison the news sheets in the game are much better, they automatically update with the latest news.