Eh, what
I was just talking about landing fees, nothing to do with passengers. You will find that the basic obligations of airlines with respect to disrupt pax handling are the same across the board (of course some go the extra mile). The idea is for customer service staff not to show their cards to soon though, and try to get punters to settle for less (ie maybe they have suitable accomodation and don't require a hotel - even though they are entitled to one).
In the situation I refered to (diverts into Palmerston North) it's a simple matter of putting them on a bus - no meals, overnights etc required.