#6 Automatic delete for me.
Lately, there have been several threads asking why a provider didn't respond to questions or date requests. As I cannot speak for others, I will give my own top reasons for not responding. (and yes, I must do it Letterman-style lol)
10. You asked what I consider to be questions that indicate you are very particular: do you have stretch marks? what do your tattoos look like? is your hair the length in your recent pics or the earlier ones? what color nail polish will you be wearing? how often do you get manis/pedis?
9. You wrote something that irritated me; often in the form of negging, example: I don't usually go for older women, but you look like you've taken good care of yourself! (Please note that I normally do reply to the previous two, but not when I'm in a bad mood. Then, I just hit "Delete"!)
8. Your name and/or contact info are very similar to someone on my Do Not See list. (Sometimes I will respond to try to verify one way or another, but I'm frequently too spooked to do even that.)
7. Your name and/or contact info ARE on a blacklist for a transgression I consider serious enough not to take the risk.
6. Your communication was just one word: Available? or "Hey"
5. I never received your email or text. (This does happen because I'll get texts/emails TELLING me it's their 2nd attempt when I didn't get the 1st!)
4. I just plain flaked: I read your message and meant to reply but forgot or thought I responded when I actually didn't. Sometimes I accidentally save an email to Drafts when I think I've sent it. Duh. So I'm trying to be more vigilant about that and reduce my amount of "flaking" incidents as a whole.
3. You attempted to negotiate.
2. You referred to sex acts or money.
1. I've been sick or injured and unavailable. I get sick a lot, unfortunately, and often don't respond to emails/texts until I'm able to accept dates again. Just because I'm posting, tweeting, or blogging doesn't mean I'm available. At this very moment, I am sick in bed with Norovirus and really should be responding to people who are looking to book.... but when I don't know when I'll be back, I feel really stupid replying. Something I need to work on, obviously. Maybe I'll just start using Auto-Reply in those situations.
These are my honest reasons and while I realize the "professional" thing to do is to send a polite no-thank-you, I've found that these situations can quickly get ugly, which causes me to hesitate. My actions (or lack thereof) are more often guided by my fear of retaliations than by bitchiness. 
Recently, H+T mentioned that she sends a quick note after which she quickly blocks that person. I'm planning to do just that in future...... provided I can figure out how to block emails and texts, that is. LOL.
These are just my reasons, but I'd guess other providers have similar ones.
xoxoxoxoxoxoxoxoxoxoxoxoxoxoxoxo
We will have to discuss number 3 privately I see. LOL
Great thread and very helpful for the newbs.
As a follow up, I would just add to the newbs that if your first contact does not receive a response, it is perfectly acceptable to send a second, follow up contact, although I would wait a few days.
If that generates a no response, move along to girl #2 on your list. DONT blow up her inbox.
That doesn't mean you can never see her as things change. Try again in a few months as some girls take a break from the biz, go on vacay etc.
Good post Deb!
After yesterdays debacle, I am so happy to see a provider post something helpful to the newbs without sounding bitchy or condescending. Great job Deb and I hope you get to feeling better.
and now Jack has his answer about why you didn't get back to him, right? lol
I will also add that number 5 is the reason I almost always make a second attempt if I don't hear back the first time. You'd be amazed at how much email never gets to where it was supposed to be going. If after a second attempt I don't hear anything, i simply let the matter drop. There are some places where persistence is rewarded, this is NOT one of them. Persistence can easily be taken as stalking, a major no no.
Lots of us get really exasperated with having to repeat ourselves, so a lot of times if I get an inquiry that demonstrates to me that a potential client didn't bother to read my ad/website, then I'll typically just let my auto response take care of it. TER guys are usually pretty good about this, but it's important to remember nonetheless. I promise we don't write all of that stuff just to take up bandwidth.
As I was typing that, I thought of one more reason: the person is asking me to bend my own rules. For example: "I know you don't see anyone over the age of 60, but although I'm 75 I look 40!" or "I know you require xyz for screening, but my P411 Okays should be sufficient." or "I'm not comfortable sending a deposit, so can't you just drive 3 hours to my city without it? You can trust me."
Other than that, Debbie nailed it as usual.
Get an automatic delete...that is as bad as saying will you suck my dick for $$$$. Zero respect. So I repay with zero respect.
#6 Automatic delete for me.