Having been in the hobby for 38 years I would say the internet an review sites have at least made it a lot easier to find a good escort and I assume it has led to there being more out there since it has created a good market and escorts need to be responsive to market opinion.  The down side is that some good ones have become so popular as a result that it is nearly to book with them or their prices have gone out of site.  But this approach to the hobby sure beats the days of cruising the streets, blindly answering newspaper or yellow pages ads, or going to an unknown AMP.

Now there's less hit-or-miss, but a consistently higher price for anyone who gives decent service, I suspect. "Legitimizing" in any form also tends to offer greater benefits to the business-person as well as to the client, not only in terms of profit, but also safety, cleanliness, working conditions, etc. Gone (well, more accurately "going") are the bad old days of hiding out on the back streets of blighted industrial areas and linking one illicit trade -- sexual services -- with another -- drugs.

There will always be a demi-monde. Internet reviewing hasn't eliminated it, it's just provided a NEW monde where people can meet for providering.