That is interesting. I assume robots here means something close to humanoid for rent, and be programmed to take some or most of the human's job and not robots in terms of industrial manufacturing machinery?
They're industrial robot arms, not humanoids, although the concept of android workers getting paid an hourly fee or "wage" (going to their masters, an android rental corporation) would be fascinating.
Even just a robot arm with an appropriate sensors and hand attachment could replace human employees in the world's oldest profession. Consider what drove the video industry if you're looking to invest.
Robot, as used here, is, in more modern forms, one or more arms with a vision system. Or some kind of mobile base for moving things around.