Over the last 15 years, research into various online addictions has greatly increased [1]. Alongside this, there have been scholarly debates about whether internet addiction really exists. Some may argue that because internet use does not involve the ingestion of a psychoactive substance, then it should not be considered a genuine addictive behavior. However, the latest (fifth) edition of the Diagnostic and Statistical Manual of Mental Disorders [2] re-classified 'Gambling Disorder' as an addiction disorder rather than a disorder of impulse control as it was in the past. The implications of this reclassification are potentially far-reaching. The most significant implication is that if an activity that does not involve the consumption of intoxicants (i.e., gambling) can be a genuine addiction accepted by the psychiatric and medical community, there is no theoretical reason as to why other problematic and habitual behaviors (e.g., shopping, work, exercise, sex, video gaming, etc.) cannot be classed as a bona fide addiction.Even among scholars who believe internet addiction exists, there have been debates in the field about whether researchers should study generalized internet addiction (i.e., the totality of all online activities) and/or specific addictions on the internet such as internet gambling, internet gaming and internet sex [3,4]. Since the late 1990s, Griffiths [4,5] has constantly argued that there is a fundamental difference between addictions on the internet, and addictions to the internet. He argued that the overwhelming majority of individuals that were allegedly addicted to the internet were not internet addicts but were individuals that used the medium of the internet as a vehicle for other addictions. More specifically, he argued that internet gambling addicts and internet gaming addicts were not internet addicts but were gambling and gaming addicts using the convenience and ubiquity of the internet to gamble or play video games [4].Prior to the publication of the latest DSM-5 [2], there had also been debates as to whether 'internet addiction' should be introduced into the text as a separate disorder [6][7][8]. Following these debates, the Substance Use Disorder Work Group (SUDWG) recommended that the DSM-5 include a sub-type of problematic internet use (i.e., internet gaming disorder [IGD]) in Section 3 ('Emerging Measures and Models') as an area that needed future research before being included in future editions of the DSM [7]. However, far from clarifying the debates surrounding generalized versus specific internet use disorders, the section of the DSM-5 discussing IGD noted that:"There are no well-researched subtypes for Internet gaming disorder to date. Internet gaming disorder most often involves specific Internet games, but it could involve non-Internet computerized games as well, although these have been less researched. It is likely that preferred games will vary over time as new games are developed and popularized, and it is unclear if behaviors and consequence associated with Internet...