Student or Learner
today I was surprised by collocations "light user" and "heavy user" in the context of web traffic: "The model (i.e.: the metered paywall model used by online newspapers requiring paid subscription, DS) is designed to allow the paper to retain traffic from light users, which in turn allows the paper to keep their number of visitors high, while receiving circulation revenue from the site´s heavy users."
In my mother tongue one could use such a collocation just in the context of drug addiction - how is it in English? Does it sound "natural" even in such contexts as is the one mentioned previously - or even in other contexts?
Also, Internet addiction does exist.