...how some providers have a very inconsistent multi-hour price tragectory, which makes little mathematical and no business sense at all.

there are many ladies who per minute rate is lower at 90 min than at 60 min, but then goes higher for 2 hrs, as mrfisher was pointing out.

it seems to me you either have a lower rate/per min the more hours booked, or you don't, either way it's great, whatever the market will bear.  but to be a better deal at one allotted time period but then a worse deal at a longer allotted time period seems illogical to me, and not smart business wise.

some ladies i have figured out i could see for four 90 min. sessions and wind up paying less money than if i saw them for 3 two-hour appts instead.  whatever ladies!