1) Whether or not she advertises here. If she does, she will see more reviewers. If not, she'll see fewer.
2) How many regulars she sees
3) Whether or not she does predominately shorter or longer dates - in my personal experience, reviewers are far more numerous among the guys who request 1-hour dates, and far less common among those who prefer dinner dates or longer
4) Whether or not she asks her clients to review her
5) Whether or not she offers an incentive, either monetary or timewise, to those clients who write a review
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I thought these past few weeks were crazy, in terms of the amount of clients I saw... Looking back on my calendar, though, I only had 2 new clients. That's fairly normal for me... I still only have one page of reviews, despite having an online presence under my current name for over 3 years. My last review was several months ago.
Of the people I saw this month, 1 has reviewed one or two others in the past, but has never reviewed me (I've seen him several times over the course of 2 years and we've never talked about TER). One reviewed me under a former name. One might review (he has no review history, but did ask me to whitelist him).
I can remember two who contacted me, who I did not see... one was heavily blacklisted, the other just kind of came across as sort of a jerk