What does it mean when a provider lists the donation on her web site like this

One hour: 400/500

Is this incall/outcall?
Outcall/incall?
GFE/PSE

if she doesn't explain it herself. It could be any of the scenarios you mentioned, or maybe the upgrade is for Greek, or it could be something completely different. It is not up to you to assume what it means.
First, are you sure there is no explanation on the website?

I have seen it where it is listed something like this:

           Incall/outcall

1 hr.      400/500
90 min   xxx/yyy
2 hour    aaa/bbb

Sometimes depending on your browser (especially if you are on a phone or tablet and the website wasn't set up for mobile, the format is thrown out of whack, so lines don't line up. You might get something like this:

Donations                      incall/
Outcall
400/500   Xxx/yyy

Double check that you didn't miss something and that the format is not out of whack. If not, then you will have to clarify with her (or just move on to someone else whose rates are clearer) As I said earlier, don't make an assumption based on something someone here says it might mean.

Could be any of the above.  I'd ask her thru whatever communication she asks for.  There is no sense in going further with her until you know exactly what she means.

LLAP,
Swim

If so, it could represent her donation in terms of US and Canadian dollars.

Good one...eh

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I would assume incall/outcall but I would ask her. I find it odd that her ad / website wouldn't specify.

cigarettes, or was that a typo?

A cartoon, rather than a photographed, Lucky Strike model.  

LSMFT: loose straps mean floppy tits (a throwback to my 4th grade schoolyard days! Yeah, we knew what tits were back then.).

So what's with Canadians and Lucky Strikes??

Right on. I knew Lucky strikes were cigarettes, but that's about it. Lol. Honestly wasn't sure why he said cartoon, then it hit me maybe was supposed to be carton? Haha.

So what is up with Canadians and lucky's?

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What does a Canadian tell a friend who's going down to the USA?

Answer:  Bring me back a carton of Lucky Strikes.

I guess at one time they couldn't get American cigarettes up there.

(You know, being so backward and all, and allowing legal sex for pay.

Samantha, out of curiosity, can you suggest a delicate way to raise that question?  A lot of you are reluctant to discuss rates by phone or email, and prefer that it be handled without being mentioned - but this situation is obviously one in which it's necessary to clarify.

Of course, most of the ladies with such a disclaimer also have it on a well-formatted website and it's pretty clear what they're asking, so maybe it's not often an issue, but I'd like to know how you'd like to see that broached respectfully.