One agency in particular is fond of this phrase.

It is an undefined term meaning whatever the person wants it to mean.  Advertizing fluff.

It could mean she is open to various services...or it could not. It might refer to the fact that the lady is open to taking care of a gent regardless of his age, race, body type etc. It may not mean that she is open to a variety of services.

That's my interpretation.

It does not.  One girl I've seen whose ad says that allows no ass play at all.

I have no idea what it is supposed to mean, but to me it means nothing.

several months ago; the answers were generally that it indicated a willingness to consider special requests like mild/modest fetish stuff (role-playing/costumes, maybe light spanking, etc.).  Those same sites are usuallay very explicit about Greek-friendly, etc., so it doesn't imply that.  Mostly just some more hype to get you to bite.

it used to be when ladies advertised in the back street papers that open minded meant BBBJ and VERY open minded meant CIM

If you compare the usage of these terms by some of our most popular local agencies with the reviews of the women they are applied to , you will see that the pattern tends to hold...

Not very meaningful, IMO.

In the case of well-reviewed ladies and main stream agencies, then GTM and others are "probably" correct, in that it can mean things like BBBJ, CIM, etc.

However, IMO, without any reviews, it is purely ad hype.

Opem Minded is merely a state of mind.
 Like  beauty,it depends on what  mind is thinking at the time.
    YMMV