Many escorts limit their advertising to one site, adultwork. Yes, it is a good site to advertise on, It does bring in work and also has other revenue opportunities such as selling private pictures, videos and webcamming.
Don’t limit your advertising to this one site. What happens if the site disappeared? Where would you get your clients from. You might not believe it would be possible for it to vanish, but it has in the past, and could do any day again.
A few years ago, the website would vanish for hours on end. The site was under powered, and subject to Distributed Denial of Service attacks (DDOS). The site would be unavailable for hours on end. This failure, or hardware failure, or other attacks could happen any day, bringing the site down for a long time. It happens all the time. To other major sites. Banks, shops, Visa cards have all been subject to outages which cause chaos.
There of course other reasons why limiting your self to AW is not a clever idea. Many escorts have had their profiles ended permanently, or for a few days for infringing some obscure AW policy. This happens and has happened to many escorts I know.
So yes, it is a clever idea to have your own advertising, for instance your own website, optimised for Google search. Advertised on other escort directories, directories that specialise in escorts in your area, such as York Escorts. Choose some local directories or client forums local to area. These can bring in work for you.
You should also choose specialist directories. For instance, if you have a large body size, then choose a BBW escort directory. If you are well endowed on top, then a big tit escort directory might of a good place to advertise on.