Minimum Stay Requirement For Domestic Flights

According to ABC News, starting in October, United Airlines will be requiring minimum stays for domestic flights. This means if you are taking a quick business trip and are planning to fly United, you might have to stay at your destination for three nights.  Are there many people who need to take a trip that is shorter than three nights? If there are then what would stop them from buying one-way tickets? This is just another crazy idea the airline industry has to try and combat the rise in fuel prices. 

As well as requiring a minimum stay, United will be raising their fares by as much as $90 for a one way ticket. So buying separate tickets would be out of the question, unless you are willing to pay the extra $90. What new fees will the airline industry come up with next?