A recent paper written by Dr Daniel King and Professor Paul Debabbro, University of Adelaide is available on the Wiley online website. The article begins: Predatory monetization schemes in video games are purchasing systems that disguise or withhold the long‐term cost of the activity until players are already financially and psychologically committed. Such schemes contribute to the increasing similarity of gaming and gambling and the potential for financial harm for those with Internet gaming disorder.

Professor Defabbro is one of the speakers at IAGR's forthcoming Conference in Copenhagen, September 17-20. 

https://iagr.org/industry-news/predatory-monetization-schemes-video-games-eg-loot-boxes-and-internet-gaming-disorder