So should I just offer good advertising opportunities for independents? Seems to be far to many scam sites doing that ..... Hence why I was going the other route ...
Possibly but the bad WG's will not understand the importance of excellent advertising or resent the money they have to spend to achieve this I would imagine they would be difficult to deal with professionally as much as they are when interacting with punters. Also would they be good long term revenue streams for you as (Hopefully) by providing bad customer service eventually they will be forced out of the market.
While the good WG's will probably treat their business professionally and have a good profile on AW (Still the largest contact point) and maintain that profile themselves to a high standard. Also they will understand the importance of repeat business and recommendations and because they understand this provide good customer service. All these points would mean they would not need the services of a Indie advertising site. Of course if it was cheap enough and had enough hits maybe they would but thats the risk of start up.
Maybe a route to go down would be to focus on those who provide very specialised services there are certainly lots of kinks and fetishes which people enjoy. Have a look and see if they are catered for if not, could you provide the contact point for those punters who wish these services.
I still think the internet has moved on in recent years and "Middlemen" are no longer as popular as they once were. One day punters will walk down a street in a pair of google glasses and as you pass a house a pop up will show the WG in that building, her services, reviews and if she is available. Now that will be fun.