You find an ad for a gal on Backpage: she lists incall 1 hr $150.  You call and set up appointment, arrive at her hotel, hand over the donation, and get undressed.  She has you lie down for massage.  Eventually, you ask her to blow you, and she plays the B&S on you.  She tells you the $150 was for massage and so forth, if you wanted full service the price was $500.  How should you handle the situation?  (GaGambler, I know you got me on this!!!)

The first way you take care this is search TER. I searched your question and its asked a lot in different ways. Answered a lot also but usually the same way. Second way you fix this is stay off Backpage. Finally last way to fix this is get dressed go to car, go home and masturbate. Then when you thinking with the right head, search TER for a well reviewed provider.  

Some providers I have looked at are on Backpage AND TER.

Of course I am sure there are many, and did you look reviews and see if it say bait and switch. I think I am trying to say why use Backpage when you can see reviews on TER.  

Of course. I would feel very uncomfortable seeing someone who was not reviewed.

The story ends with subject on table naked with a gal who just pulled a B&S.  I'm sure going on TER is not the First thing to do...(thanks for response though, I mean that)

I think what I am saying is best way to handle it, is not to be foolish enough to be in that situation to begin with.

He may not listen though. Bait and Switch is when you see a real hot girl in the ad, and when you go there or she shows up, it is a different girl.  Same advice applies, leave.  The OP is describing an upsell.  Your advice apples as well.  Stop and leave.

What you do is put on your clothes and walk out, if you somehow managed to get in that position in the first place. Of course what you really do is stick to well reviewed providers and not get into that situation in the first place.

Sorry, you are 100% correct: we can't put ourselves in bad situations such as the one as I described, if we do it's our damn fault.  There's TER providing credibility to the hobby industry, background checks, reviews, etc...wasn't the point of the thread.

If you start on BP, ALWAYS cross check on TER. If you start on TER (as many of us do), and end up on BP, go back and double check TER to make sure about the situation you might be getting into.  
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If the person in the story doesn't know about TER and is just reading BP, he should still just get up and leave, even tho' you don't provide enough detail. I -ASSUME- the ad was for massage and the guy -ASSUMED- it meant more. That's why you check TER first, BEFORE making an appointment.
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And perfectstorm is also right: what you describe is not B&S, it is upsell.

..one who clearly answered the question (ChristineGFE sorta...)

Actually you have been given good advice (again) even though most of it didn't answer the question you asked. That fact doesn't change the fact that the advice itself wasn't spot on.

What did the ad promise to deliver for $150?  Did it say anything about a BJ?  Or did it only mention "massage"?  If the only promise was a massage or sensual version thereof, IMO the OP had three valid choices:

He had already tendered the $150, his only way of getting that $150 back would be to physically take it back, and I guarantee you, an upselling bitch like what he described is NOT going to give him a penny back without a fight, and that is simply not an option over $150

If I had to do over again, I wouldn't say the Gent found her on BP, I would've said he found her on TER, and she had awesome reviews.  Obviously, chances of that actually happening aren't great, but it was damn near impossible to focus people on the point: what to do in that situation?!?!  I thought it was a worthy topic to communicate.  Happy we're in agreement on it not being wise to get into a fight.

All he said was that she offered incall for $150. We don't know what else the ad implied. We don't know where he found the ad. Was it under the massage section or the escort section? (I know BP doesn't have an escort section now, but they used to and we don't know when this happened.) Anyway I made an assumption based on his brief post.  

Then my opinion holds:  it's bad advice to say the OP should have got up and left.  Yes, that's his right, but all that does is justify the provider's upselling behavior:  "Haha, I got $150 and didn't have to do anything."  Why not get a massage and whatever else $150 buys?  Or better yet, negotiate.  

Amazing the pains I must go through to have the simple question understood.  
OK, so this is "Up-selling", FS doesn't get provided for $150.
Let's change that number to $300.  All the other facts of the story remain constant.  Then what do you do?

i thought you were concerned for her safety?

... here's what I would do:  I would steer clear of someone advertising on BP and charging $300 without having some review history on her from reputable reviewer(s).

At least you get something for your $.

Must feel so good exerting more energy in avoiding a simple question rather than answering it.
And no, you didn't answer it.  I'm not getting an answer I don't like, I'm not getting an answer.
All that stuff about research, background checks, screening process, blah blah blah...is nice, also irrelevant to this topic.
Yes, I get to say your answer's irrelevant cause I asked the question.  
     
    What is relevant is the topic I've presented: if you find yourself naked in a hotel room with a provider, having already tendered $150 (or call it $300 to make u happy), and then discover she won't blow you without another $200, what should you do?

...if she doesn't do what you simply assumed she'd do for $150."  So you're ok with up-selling?

... because you're having trouble reading. I already answered your question re what you should have done, and what I would have done, at the $150 level.  At $300 I wouldn't have been there to have to make that choice.  What I would do then is avoid that mistake.  

... in many marketplaces, not just p4p.  

Actually, Christina, if one does their research, bp does have quite a few gems. One my favorites advertises there, and she's $150 for fs.

As both a BP and a TER peruser, I feel your pain.  I have found some gems on BP, but I have also found some upsellers, bait and switchers, etc...  Knowing what I know now, all I can say is do as much research as possible to set yourself up for success.  I have and still do find many ladies in my area that provide FS for $150.  The thing with BP is, no-one is held accountable for up-selling and if the provider is reviewed and knows about it, she switches numbers/names and scams more people.  I recall a few times that I have seen ladies that offered "massages" and before I know it I was getting sucked off BBBJ style.  On the flip side, I have went into other sessions with similar advertising expecting more and not gotten the same results.  

Thanks man, sorry it happened to you, we're not alone unfortunately.  Sorry for not being specific, I didn't say it was a massage ad, I didn't say it was an escort ad, I just left it to assumption.  

Thanks man, I'm with you: cut your losses and move on.  Sucks, happened more than once, but glad we're in agreement: no need to escalate situation, we all have too much to lose.

i think we hit Paydirt!!!!

It's crazy, but I'll leave that off the board here.  Correct, don't put yourself in bad situations, I'm with you.  Wasn't sure about it at first, but I actually liked the loaded handgun analogy, that was pretty cool.

I don't know if it's paranoia, but in general having cash is a bad thing: once it's lost, it's gone forever, you're right to take precautions.