I've been hobbying in NYC for a decade seeing ladies from all spectrums of the hobby, and without fail, the girls have always grabbed a condom when the time came. While I am sure BBFS is available from many, I find it very hard to believe that the girls you saw randomly decided not to use a condom without you somehow bringing up the topic. Did you, by any chance, ask them for BBFS? No judgements here. I am just trying to make sense of the situation.
As for your actual question, high ratings can mean a number of things. You have to take all the information. For example, if there is a girl who you think is genuinely unattractive, or moderate, and yet her ratings are all 10/10, then it's certainly possible the score is being tainted by something else. Whether that's BBFS, or trading discounts for good reviews, or something else, who knows.
I don't think you can assume very high ratings to mean something specific.