Well my friend I can sort of relate/empathize,
I happen to be of Multi-racial heritage (Brown-skin) and personally always preface talking to a provider with....lol..I'm a person of colour...Now, the responses i've gotten, in my personal experience, have been quite humorous but fortunately never offensive or rude. i.e. what does "person of colour mean" or "what are you exactly". Every provider that i've seen has been very nice and sweet. Again, fortunately i think that i've been blessed. But i also guess I assume that this Hobby is very liberal (Probably my mistake in assuming)and prejudice doesn't/shouldn't enter in to it. Now i could go on an extended diatribe and talk about how everyone has a personal preferance (Providers and Hobbyiests alike) and that it isn't necessarily racism or prejudice but personal choice. But, the fact of the matter is that this hobby, or a big percentage of it, is for $$$$ and my advice to you is that if you get a response like that, accept it, and realize that you have other options with other gals. I have heard from Providers that they have had bad experience(s) with men of colour, particularly African, African-Americans and Middle Easterners, and you, i nor anyone else can change peoples microscopic views of colour and cultures. Also, who would want to invest time in trying to change someone?. I also preface my conversation with them that I am a professional and educated male who would enjoy their company. In a nutshell my friend (In this ranting diatribe) is that it's a hit and miss as with any potential encounter you have with a provider and they have w/you....On another note, Would you e-mail me privately or post (If you feel comfortable enough) The names of the providers that have turned you down for The specific reason of you not being Caucasian.....I don't want to run into that foolishness if at all possible.

I would think many of us would like to vote against this behavior by not patronizing these "ladies"

Jeff

Sorry for your run of bad experience.  There are many fine women availible here and listed on other sites.  There are also many ladies who are just a little unreliable.  Some will blow off apointments without a thought.  Its best to check several reviews for each lady you are interested in.  Try to pick ones with lots of good reviews  (but evan the best ladies have personal or family problems come up that will cause them to miss an appointment from time to time).  

Also ladies who read this;  "If you can't make an apointment for any reason, please call the customer so he can make other plans!"  Yes. customers should do the same for providers!

I can't help you with the race thing, but I know at least one provider I was with prefered Black men.  I can't measure up

Here's my worthless 2 cents on your problem.  I've never had a problem with a provider rushing me through a session and trying to get me in and out as soon as possible.  No pun intended.    I guess I've stuck with providers who are known to provide great service and nothing more so it's never been a problem; but as always it may be a case of ymmv.  As for your second concern with providers not showing.  I've had a few of those myself and the ones who haven't been polite enough to respond or make an attempt to make up for it have not been given a second chance.  Again the times I've been stood up by providers has been by the less than "professional" ones.  The once or twice it's happened with a well known provider, they've more than made up for it in future appointments.  And as for your final concern about race, I dont have any good suggestions.  I know some ladies have had horrible experiences in the past with certain races of men and I can see how that would sour their impression of a race.  My suggestions is there is someone out there for everyone and if a provider won't see you, cut your losses and just move on.  Dont be one of those guys that hounds them to meet because it doesn't make you look good.  
But that's just my opinion, I could be wrong.

I'm sorry, most guys take some time to find their ATF's.  

re: one-pop rule
Sorry that happened to you, it isn't right.  I hope she reads this.  Maybe send her a copy of the link *smirk*  You're obviously not an accountant or you'd have calculated the difference and taken some back.  

re: no-shows
No way to tell other than reviews and posts.  I think there are threads on this board about no-shows.  Try a search?  We're all guilty of canceling apt's, but no-shows aren't too cool.  

re: boyfriends
You can't do anything about it, take it as a compliment.

Find another hobbyist with similar tastes.  Allot of TER mail is from info requests off reviews.