So I contacted a provider a few weeks ago and the rate on her website is 300, confirmed an appointment for tomorrow last week and the rate on her website is 350 now. Do you guys say anything or just pay 350?

You know  I think we have all heard GG call that hooker math  in t he past.  Maybe your opportunity for an easy way to deal with this " i  am a little confused I was just checking up on your likes/dislikes before our visit and I noticed this error and where praytell do I fit in by the way"
Suzee

But you'd better check because the worst thing you could do is show up with the smaller amount and have her tell you you're short.
If she tells you you don't get the old rate you can either pay the $350 or cancel.
Personally, with me it would depend on how hot she is. I wouldn't like it if this happened to me but, then again, $50 is small change.

It’s OK to reach out to her and ask for a rate confirmation, noting it was $300 when you booked. But it’s too late too cancel without a cancellation fee or likely blacklisting, so be prepared to spend $350.

Your rate is the rate when you booked her.  So put $300 in the envelope and bring at least $50, preferably at least $100 for a tip.  If you would not see her again then don't tip.  If you would then give her a nice tip that brings the total to more than $350.

NO. You DON'T ask about her rate "when requesting a booking." You rely on her ad and her web site and you don't bring up her rate until she's screened you. Asking too soon is a great way to have her immediately ghost you.
Dumb, dumb, dumb.

so i guess if gas was $3 a gallon last week .and this week its $3.25 a gallon you only pay the station  $3 ...  how has that worked for you ?    

Here is a better one. Last week you book a room for next week at $300 for the night, this week you see the rate at $325 for the same room. What fucking idiot is going to pay $325 for a room he has a confirmed reservation at $300???!!!

that's the first test.
How bad do you really want to meet her? Test 2.
Are you concerned about blacklisting or harassment for cancelling? test 3.
Do you have the nerve to just have 300 in the envelope with more stuffed in your sock? Test 4.

Except for when you book the room they place a hold on your card. At least every time I have done it. Im sure if he offered to pay her the rate last week or give her a deposit in the amount of the rate she probably would have honored it.

Unless otherwise mutually agreed to, the price is set at the booking.  Otherwise a escort could advertise for $300 and then after you book, bump it up to $3 million.  

Date booked 2 weeks out.  Noticed 2 days prior to date, she increased rates the same, 300 to 350.  

Last year. I saw someone in Minnesota. I booked a couple weeks in advance when her, the 2 hour rate was $650. I checked a week before her appointment, it was $700, but she grandfathered regulars at her $650 rate.  

Hey

Screenshot her rate page when you book and take it with you when you show up for the appointment.

I have seen ladies advertise different rates on different sites. I always ask for a clarification and assume that in a case like that she just forgot to update one of the ads.

...if older client should be "grandfathered" q old rates..."price is only an issue in the absence of value"...if you never met before/knowing what you know....would you pay for what you getting????

Except the "hold" you're talking about isn't really them getting the money paid. What you are talking about is the authorization to the bank providing the credit to you. Until the hotel submits the sales draft for payment - generally at the time of check-in. Which in this case would be when the client walks through the door.

It's always been a no-no to discuss rates beforehand. You go with what is advertised. If the rate charged after you booked it shouldn't be an issue but like others have said it wouldn't hurt to have an extra 50 on you.

I have some clients that I've met over a decade and my rate was $300.  I gave myself a raise $50 about 3 years ago.  Many of them pay my old rate and many pay my new rate and tip on top.  I personally, never bring up $50 discrepancy.  But I did have a problem early this year where a repeat client shorted me $100 for the first time.  Honestly, I was very angry when he left.  I had seen him a few times and did not check the envelope.  I was angry because it was a double and he shorted both of us $100.  I almost called him but I waited until he called me later to book again.  When I told him about the discrepancy of total $200 for double.  He said, one of my past double partners done a double with him and another provider and only charged XXX.  I called my provider friend and she said that was a one time special for him.  I did decide to send him to my provider friend in the future, because I truly believed he was tapped out at his limit.  Thanks, Maddie

If a provider has a website and/or ads there is no need to ask about rate and length of appt.
I have a website and ads and every so often I have someone do ask this before screening. Even after screening is kinda like c'mon dude that is what our website and ads is for.Especially if there has been no drastic change that needs clarification
I can see if a rate change as the OP has described from the time of booking to the actual appt date.
A mention of the change I don't see as inappropriate but then again like you said in another reply 50 is not a big difference.

Lol! Love it!

That market has no agency of recourse (TER forums closest?) and is far short of 100% reliable.

You are correct. But, 300 to 350 is tame.  Most girls touring my city have jumped from 300 up to 500+.  

I do see the mistake of girls whose income has declined because of lack of biz, raise rates to make up for the loss.