The concept is really the following:
The truth does get spread within certain private groups and private channels. Publicly, the truth is withheld deliberately to make sure the girls with whom the experience isnt good, still get business and tell other girls they can do business here.
It's a bribe or perhaps lobbying, so to speak. The truth is getting exchanged for a future promise.
The people in private channels don't care, because they do get the truth and also get to enjoy the future promise of quality. They have a win-win proposition.
Clearly, if truth didn't hurt the business, they'd have no issues stating it in the open. So, who gets fucked by lack of truth? Well, people on the bottom of the pyramid do.
What do people lose if they start telling the truth? Well, the girls will tell other girls in Korea, hey huns, tough crowd, they're airing out publicly, you might not make as much money just peddling bullshit. And in the process, some quality will get lost inevitably or yes, traveled to another city where they can make money without the tough crowd.
And the argument these people make for not telling the truth is that by letting the guys at the bottom take the fall, they enhance the overall quality. But again this is only a win win proposition for the top group. Inevitably, people at the bottom get fucked, because if they didn't - no one would care about truthful bad reviews.
Personally, I'm a simple guy. I'd rather be broke together than rich alone. I also don't think entities built on lies, dreams or bones of others are fundamentally sound.
Maybe some people want to live in the matrix and never take the red pill. Some people are OK with cultivating an illusory environment in which a subset of people are fundamentally used for another group to have higher quality of things. We all make our choices.
The great thing about truth? In the end, it tends to come out.