You have to do a little work. Are you talking about Vancouver (your previous post) or Victoria? You need to become familiar with the advertising sites referred to, or the agency referred to, and search this board for other mentions of the same provider for other clues. No, you are not missing anything. Direct links are not allowed on this board except to paid advertisers. In Victoria, there are only three incall/outcall agencies with websites, and other independents (who usually advertise here or on backpage). Most reviews refer to these by abbreviations.
As a visitor, you are better off sticking with those reviewed here, and research them a bit.