Companions in Phoenix could have the same camera issues as in Canada.
In response to your questions:
1) Darkness not an issue for IR cameras. I can "see" my home office from anywhere in the world 24/7 even in total darkness. It is black and white vs color when there is light. Uses small IP camera with 7 days recorded in the Cloud and can see live at any time.
2) Canadian gals would not tolerate a pimp. Most agencies are women owned who use to be escorts a few with their husbands. Most have been around 10+ years. Without the legal issues there is a huge demand as well as huge number of women seeking to work for the well known highly reviewed agencies.
3) Most men prefer agencies since huge websites with pictures info, schedules and easy to set up with a booker for either outcall or now since legal most agencies have opened incalls around for example Toronto. I have never heard of escorts delivered late or no shows. Most agencies are like an extended family with owners and workers supporting each other in everyday life not just in business. Often my first screening is by agency website pictures and I can narrow choices by my preference for slimmer bodies, natural C breasts or smaller. Then I look at the 3 huge forums for reviews. No one pays for sex only for companionship which complies with C36, although most police organizations ignore for private consenting adults. If enforced it is likely to get overturned again by the Supreme Court since violates harm reduction idea and the "security of the person" under the Charter of RIghts and Freedoms. Most of my interests are more sensual than sexual which is sometimes hard to distinguish in typical reviews.
4) The gals do not have to pay for ads, they have a driver pick them up from home and take to appointments and screened clients. Far easier than trying to be indie. They also get a high percentage of payout's than the often 50% in the U.S. at the few agencies still taking the legal risk. Very roughly on a $200/hr outcall - $20 to driver, $20-40 to agency and rest to the gal. Incall probably different since usually a high-end condo or hotel room is rented by the agency.
5) Rarely need drivers for security but if there ever is a problem and doesn't return from say a hotel room, the driver will call hotel security and if needed police since they have no fear of police like in the U.S. Is the Canadian "harm reduction" model. Frankly, I have never heard of driver needing to contact hotel security. This would also discourage a bad guy from doing anything bad.
There was years ago the Russian mafia agencies that had some "stolen" escorts. However the escorts were able to contact police (long story) and the bad guy Russian pimp was arrested and no problem for the escorts.
In the U.S. this is a criminal enterprise. In Canada it is "harm reduction" and "security of persons" by legal private consenting adults.