The first escort review boards were around pre-internet in the BBS days in the early 80s. I remember a fun one that went online in 1980 at 300 bps, running on an apple ][ computer with 2 5 1/4" 360k floppy drives, one for programs and one for data!
At that time, no one had heard of HIV and a condom was usually an "extra" that you could buy, both for BJ and for FS. Many SPs did not carry condoms with them. Herpes was considered the big thing to worry about, and it was thought of as rare, even in SPs.
The basic services were HJ, BJ, 1/2 and 1/2, and FS. What is now called GFE was pretty much the norm, unless you went with an incall agency or a SW. Prices were about $40-50 an hour and for Hockey+dinner+overnight it would run about $300 for a high-end GFE SP. (Of course, gas was under $0.10 a litre, a caddy was under $20k brand new and you could get a nice house for about $40-50,000)
So, if you want to talk about "Before escort review boards" remember that you're talking about the 70s and before.
Not a lot of currently working SPs were born, "Before escort review boards"
(Note: this post refers to what things were like in Montreal in the very early 80s, no idea if Vancouver was similar or not)