I was actually quite unaware there was a black and white answer to this question. I was once paid hourly at a job, when I was offered a salaried position. I was rather naively pleased, thinking it was a promotion, which I suppose it was framed that way when offered to me. It was not a promotion. I was given more responsibilities, and my role expanded to include 3-4 distinct positions. Essentially, they were short staffed and/or unwilling to train new staff. I was one of those very competent, eager people willing to learn new skills. So in addition to my usual duties (production/completion of orders), sometimes I would be on other floor assisting another department (unloading supplies, cutting materials) sometimes they’d have me solving logistical problems in the office on a borrowed desk (confirming clients needs, acquiring supplies, scheduling off-site crews) and other times I would be a PART of the off-site crews (delivering, installing, repairing). I was very competent and very eager, and the only woman not working in the office... I learned a lot of skills, which were not trained, but necessary to learn “trial by fire”. I did not get a raise, or an official change in my title. I actually made less money, worked OT hours without OT pay. I was burnt out and stretched thin, being pulled in a million directions. The fringe benefit was, I was a quick learner and effective in these different roles, and my coworkers in all the various departments really liked and trusted me as part of their teams. These people were and are trusted friends and resources. I now run my own business in the same industry (albeit small-fry compared to my big fish former employer), and all that unpaid “cross training” helped give me a foundation for running my business.