I agree with Howard. The problem with booking sites is their use of settings which apply to all bookings, such as minimum stay, whereas good system design would allow each day to have the option to override global settings. For example, to promote short term occupancy gaps, I can imagine having a different set of pricing and minimum stay settings. No crooks, no thieves, just good additional management with no intention to deceive. Nothing wrong with multiple offerings, multiple choice to suit the needs of both guests and hosts. However, from 4 decades experience in system design, and from my understanding that parameters are best offered at the lowest transaction level, workarounds like this would not be necessary if the system is designed correctly.