I personally think its a case of the girls want the cash but are not prepared to put the graft or effort in,
Spoke to a girl recently, happy to pay her asking fee, we moved onto WhatsApp then when i gave her my postcode got told she wasn't doing it for agreed price, and wanted an extra 50 on top (bear in mind she knew my area before we moved to WhatsApp). Again messaged several more out of a really depleted pool, no replies, but pretty much every message read,
1, girl pointed out to me years ago, if i message and book for a 30 min, and somebody else books for longer they give priority to the longer booking.........or the more cash she should have said,
But either way to us as a paying customer it sucks, just my 2p worth