I really like P-411 because it makes setting up appointments very easy.  But I see a lot of providers on P-411 who don't have any reviews.  It says that they have a no review policy.  I don't understand how that can help them.  I would never see a provider unless there are several recent reviews.  Some real beauties but no reviews!

Some decided they have no review policy, after they got really  bad review.  Some got banned from TER for something like blackmailing, extortion and etc.  Too much risk, not worth it.  Providers who want to be on TER give you way better service, they do not want to risk good thing they have.

Some decided to be UTR,  they still have reviews up, just a matter of doing research and communicating with the lady …

Some ladies will customize their service based on their perceived comfort level with a client.  If the provider perceives that their new client is a 'good guy' (follows their rules), the provider may be more generous.

 
But, they want to maintain the right to modulate some services for clients with whom they don't have a rapport.  The way they control that, is by having a 'No Review' policy.  Then, new clients don't come with preconceived notions of what's available.

 
The obviously give up the benefits of potentially good reviews.  But, if they are in high demand anyway, and have lots of repeat business.  Or, they choose to be low volume anyway, it probably doesn't hurt them.