I had this job as a second year computer science student at an Elsevier journal. Was payed <$10USD an hour. Spent most of the time on Google or dblp looking for reviewers, emailing them, and trying to get them to turn in their reviews. Actually among the 5 of us, 3 were undergrads and 2 were master students. One undergrads wasn't even computer related field. Said journal charges >$50USD per article and >$2500 for a yearly subscription.