A few years ago, after I moved to a new city, I approached several temporary agencies in an effort to find work. My initial attempts did not go well. In a couple of instances a staff member --the "gatekeeper"-- glanced at my CV/resume, and then handed it back to me saying that they could not help me. At some other agencies, a staff member --for some strange reason these were always young ladies-- glanced at my CV, asked me a couple of questions (the nature of which, indicated that they had not really read my CV), and then said to me that they would call in a few days when they had work. They were, of course, lying, which was obvious even to me because they did not bother to have me register with them. (Registration involves filling out a lot of forms and making photocopies of your identification.) To this day, I am still puzzled as to why they felt it necessary to lie to me. A couple of other agencies did bother to go through the registration process, but never called to offer me work.
Anyway, I eventually found an agency that was willing to sign me up and find work for me. The assignments were relatively tedious and monotonous tasks that "normal" people hate to do. The clients were quite happy to have someone who showed up to work on time, who quietly went about getting the job done, and who did not waste time chatting and goofing off. Being a good worker, in this sense, makes the agency look good, which in turn makes them happy and so they continued to find lots of work for me. (I now have a permanent job in a different city.)