if an agency says there is no upselling and there is a flat rate, how much do i tip the lady on a $600 hour and a half time block?

There is no set way to do that. Many will tell you don't tip. Some will say tip if you think the service was exceptional. Agency providers give a percentage of the donation to the agency so you may want to tip the provider because of that. There is no set % as when you are eating out where 15% or 20% would be appropriate. Some guys say when the provider is making more in an hour than a doctor or lawyer there is no need to tip. Some say they give gifts instead of a tip. But if you have never seen the lady before then what to give becomes an issue. Agencies and independent providers always say tips are not required nor expected but always appreciated.

Sorry, didn't give you a more concrete answer but it's really up to you and what you feel it's worth if you decide to tip at all.

If you feel better about the experience after tipping, I would say by all means tip. If you feel worse, don't. As you describe the situation, I wouldn't.

Tipping used to be about showing appreciation for an exceptional service. Now it is expected because the service industry doesn't pay well. Lack of tipping is also used to show displeasure for poor service so take that into consideration also. I guess no pat answer but I have only tipped a small handful of times.

First, I am not a wealthy man. All of my $300 hour dates, I usually tip them $50 or $60 depending on what type of bills I am carrying. The most I'll tip for a $300 hour date is $100. I even tip $100 to a $400 hour date. $100 is a lot of money, espcially for a tip, so, they should hopefully be thankful if you tip them that amount.

I even had several providers tell me that I tip them too much. That kinda summarize how much you should tip them. If your wealthy, tip her how much you want to. If I saw a $600 hour girl, max I'll go is $100. That is still money to me.

I don't subscribe to tipping in this hobby.  If the gals were working for minimum wage and needed the tips to survive (as the hairdressers and waitpersons seem to) I would feel otherwise.  But at rates that dwarf what those folks earn...not a chance has this ever crossed my mind (to tip).

If you end up seeing some gal for more than one time (and that is the BEST tip of all...she makes more money that way), offer to buy her a lunch/dinner/drink.  That would be a nice way to extend a token of appreciation...but only if she is going with you after (before) the session and you're NOT paying her to do so.

Read the forums and you'll get a flavor for how the ladies tend to play, as well as the guys.

Research is your friend here.  And given your OP it would seem you are new to this.  Don't get fooled by the ads you read.  Read the posts here and learn..learn...learn.  Otherwise you'll look back in a year and say "what was I thinking"...because you will have learned (the hard way)!

If I had a good time, $100. If mediocre, nothing.

Donation 100-180 = Tip 20.00
               200-300=        40.00
               320-500=        60.00
               550-800=        80.00-100
               900-1000=     100-120
               1100-above=  Don't push your luck

$180 or below - don't puch your luck
$180-$250 = $20
$250-$350 = $40
$350-$50 = $50 or $60
$500-$1,000 = $100
$1,000 = you're a baller, probably can afford to give whatever.

It's usually from guys who have paid a lot more for a way less enjoyable experience and it's usually coupled with a "you should be charging more."

But I don't think tips should be automatic or expected on either side.

If she was "above and beyond" what you were expecting for her rate in any way, then, by all means, show her that by paying "above and beyond" however much reflects your appreciation.

But if it was par for the rate, then she's getting plenty just paying that.