When you read that a provider is "Open Minded" what does that really mean?

It means if you are a Democrat she will not be pissed and if  a Republican will not be either .😇

for money no matter how butt-ugly you are.  

I think open minded means she's kinky and she'll try to incorporate your kinks/fantasies.  Open minded = non judgemental and willing to try different things.

Particularly So. Cal Asian agencies.  
It can also be used by a fbsm provider who offers extra services A la carte.

In generally pretty much all the terms are used a bit differently by the ladies so don't think such phrases mean what you assume. You need to verify. In the case of "Open Minded" I would read that as YMMV. As such I ignore it and read for other details and general expression to assess if it's someone worth looking into further. If "open minded" is pretty much the main description I can take from the ad/bio I pass.

...to many things, including seeing women. I found out sometimes it does, sometimes it doesn't. It's very subjective and sadly all too often it's just another buzz line to put in an ad to drum up interest. It literally can mean anything and nothing.

nothing specific more often than it means anything in particular.  

just ask the person who put it on their site?

In my mind it means she provides a BBBJ minimum

And it could mean anything...fetish, couples, gang bang, into women...it's basically an open menu depending on the $ituation.

But not always and you can end up in an awkward situation when it doesnt mean it. So you can't fully rely on that description.

In my opinion, "Open Minded", like many said here are similar to YMMV or can mean literally nothing.  Personally and from my experience, I avoid "YMMV" providers.  If they don't list what you are looking for, chances are, they don't do it.

is simply willing to explore a wider range of fantasies, kinks, fetishes and so forth than many other providers.  

It’s definitely doesn’t mean bbfs!

Does everything have a secret meaning ?