As for paying for someone who can acquit her self in different situations, I would imagine most punters on here couldn't care less about that.
Of course, and I wouldn't expect most punters to pay 450/hr, and for the record I wouldn't either. I can just see why people might given the correct situation though (outcall, needing a companion who is perfectly turned out for some event as well as fuck and being in a foreign city), so yeah I'm not defending the original profile, but this outrage over 'Ow much?!!!???' is somewhat misplaced, you might as well complain about people who use the taxi over the tube.
Some years back I used to travel in EE for various sales-y conferences - there were a few places that would staff your booth up with girls who were also willing to turn tricks at night - at the time over commercialisation hadn't set in, so you could have a great time with a genuine student who was reasonably well educated (so communication wasn't a problem), knew the city and didn't look like an obvious tart. I never paid anything like 450/hr for this - but I do wonder what I'd pay to repeat the experience if money was no object.