Why do some people feel the need to share there stats?

Personals was short for "classified personal ads" where people looked for RW dating as well as p4p, among many other things. Guys/gals over 55 or 60 would know about them but the younger set def not.
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And even though you may not ask about ethinicity or size, etc many, many women do. So it's more habit than anything else I would assume.  
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Lastly, re: a selfie, I know people under 50 generally dont have an issue with them as selfies have been around for 20 years or so, but many people find them yet another intrusion into their peronal lives and an invasion of their privacy. They dont want their email associated with how they look in person and I cant blame anyone for that.

I still see ads that ask for ethnicity and age. Not the other details though. My guess is those who send that level of detail are not regulars and simply don't know what's expected. It seems like what someone would post on a Craigslist personal ad or dating website/app.

Yes, and while it is hardly something that would save anyone having a selfie connected to your appointment bookings is going to make things easier -- and feed many here's fears about other misuses. The text description gets a good idea conveyed (a bit like representative pics that are not of the provider do) without giving out clear information that can ID a person. (Again, not something I think really has come back to bite anyone but many have a good reason not to take a risk.)

I get these physical descriptions fairly often, though. I think it’s partly because some providers do ask for things like age and race, and partly because they are hoping to make themselves sound like a more appealing client.  

Before reaching out. I will never understand why not read the providers website before contacting them?

There are some providers, and agencies, who specify a selfie is required with the initial message. They will not respond without one. These tend to be providers or agencies who do all bookings and communication via text. I have never seen it expected for those who book via email or web form.

About the old "classified personal ads":  
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http://www.theeroticreview.com/discussion-boards/boston-9/re-it-was-kens-224628
Personal ad? Was this one yours? "Hideous Neanderthal seeks attractive SWF ..."

That’s what their ads say. I have seen a few on Twitter even post angrily about clients who didn’t follow their directions. I have never experienced being ignored for this reason because if I do contact one, I provide a selfie. I’m a rule follower and always read a providers ad and/or website. And, like I previously mentioned, these are all providers or agencies who communicate exclusively via text. They offer no email or web form options.

Your very open-minded and generous view of humankind is not shared by everyone. I always mention my ethnicity and age because more than a few times I've gotten literally to the door of a provider only to have her tell me she doesn't see black men. Entirely the lady's choice, but I  wish I'd known that before I drove halfway across town.

I’ve seen girls who admittedly told me in private they don’t see certain races.  You come across as you get bothered by little things. Don’t sweat the small stuff. 🌹

Roughly 2/3 of the K-girl ads in LA state "no black men". I appreciate the clarity. If a provider doesn't want to see a certain type of man, it would be helpful if that's stated up front. To the point QB is making, not every lady is as clear as she is on her website.

I'm new to this life, and the few providers I've seen have asked for that info (age, race, etc) I also include my height/weight, only because I think it's sort of relevant, but maybe it isn't.  I just like to get it out there so if they aren't comfortable, then they can either say it, or ghost me, and either way I'll move on.

some don’t want to send selfies because they think the provider won’t book with them because they are “too ugly”

It was gifted to me from an old friend who was a quarterback in the NFL.  

My thought process is that we, as clients generally know what we’re getting via your ads which include the things you mention (age,,,height,,,weight ,,,, measurements) so I, as a 72 year old 5’ 7” inch 175 pound white male am just reciprocating !!

Us, the paying clients, care a lot more about what providers look like than the other way around. Providers care more about safety, payment, behavior, and cleanliness.

And you are "height-weight proportionate" as some put in their ads, lol!  

posting not too long ago here that was bemoaning the fact that they not like seeing men who are obese but will soldier through it if they have to.  Likewise, there have been providers who don't want to see men of certain ethnicities.   Many providers do not see men over, or under, a certain age.  It's their business, so providers who are not desperate often to see only men that they find appealing.   Otherwise, a one-hour session can feel like two or three hours when you are watching the clock waiting for it to be over with a customer who is not your type.  

I think they do it in hopes that you won't screen them because they told you what they look like.

Definitely agree. It’s obvious when you’re not someone’s type. I’d rather use my fun coupons on someone else.

I mentioned saying what we (the client) looks like,,,,,, WHERE exactly??

You mentioned we are reciprocating it because it's what they do. My point is, they do it because we as clients care. When I go shopping for an escort, I'm looking for a hottie. And, this is more often than not the case for clients. Us reciprocating it because they are doing it might be the reason some do it, but that doesn't mean it's necessary. All I am saying is that unless asked for, it's not and most providers don't care. Maybe, if there is something physically that you are worried about, it's worth checking. But otherwise, it's not.

a little rotund, and that is a deal-breaker for her, she is not going to bother screening you anyway, so in reality, she has SAVED you the price you would have paid for a session she will not be into.  Take that money and go find a provider with fewer limitations and REALLY long legs.  Lol

A selfie may show only the face.  Anyway you don't need to focus on it if it's not of interest.