Another factor to consider is that an escort with little or no reviews is just average, and people will not feel motivated to leave a review in that case.
Reviews are often prompted by an above-average and below-average experience, and you can see where some reviews refer to the fact that they generally don't leave reviews.
After an average experience I don't really feel I can say much in a review, so generally will not review.
So, yes, I agree that you cannot really infer anything from the number of reviews as regards quantity
The Gods are just, and of our pleasant vices
Make instruments to plague us