This is true. I've not noticed this myself on a number of encounters.
What I've always wondered though is whether Spa/Agency owners that are aware of this fact are, at least indirectly, complicit in exploitation. If you know someone has a mental illness, shouldn't the right thing to do is to refer them to therapy, instead of utilizing them for your whore-house?
Of course it's not the Spa's job to diagnose anyone, but my question really is a moral one. At the end of the day, the Spa is probably a much better (and safer) environment for these women than falling under the hands of some SOB pimp. That is, if the Spa itself is not one.
By the way, one thing that isn't mentioned is that the mental health issue exists on both sides of the aisle - if you've not already noticed already from the kind of characters on this forum, the people that regularly visit these places generally seem to suffer from similar kind of issues - loneliness, sociopathy, poor judgement, lack of impulse control (imagine paying 1000s of dollars a week for sex in Canada), etc. I would bet that even your so-called "regulars", who in your other comment you mentioned you're very happy to see, most likely suffer from one or more of these things, and yet, you & other MPAs have no qualms about offering your services to them and accepting their cash. Sadly, it's the same reason why girls on OnlyFans can offer services to Simps and then call themselves "entrepreneurs" for doing so.