Seriously, I don't think there's an argument against it. Let's say we held back 25% as standard, how many times would a girl get ripped off to make it a real concern? I personally am well ahead of any WG in the 'getting ripped off stakes.' Balance that against increased confidence and perhaps increased custom from punters. If I saw a WG advertising her services on those terms then it would immediately remove a lot of doubts I might have about booking her.... Provided she was hot of course.
I'd say once?
Let's ask jimmy,
I jump in his cab in LondonSkittish:
Hello driver take me to Ipswich please.JRC:
Certainly sir but as it's a long out of town journey I must insist you pay the fare upfront.Skittish:
Sorry driver I can give you 25% now but the rest of my cash is in my flat, I'll pay you when we get there.JRC:
Well I don't usually make exceptions but since you're a handsome fella, you look honest and everyone from Ipswich are known to be trustworthy...OKSkittish:
Have you been busy driver?JRC:
Someone buy you that f**king Peter Kay DVD?
So we get to Ipswich pull up at a block of flatsSkittish:
Wait there driver I'll run in and get the rest of your cash
Jimmy waits of course Skittish doesn't live at the flats and doesn't return with the cash.
Next day a different customer almost as handsome asks for a similar deal, what do you say?