>Another way is when people go to reserve seats, if someone is willing to pay $x to keep an adjacent seat empty, the price of selecting that seat goes up by $x.

>Another way is when people go to reserve seats, if someone is willing to pay $x to keep an adjacent seat empty, the price of selecting that seat goes up by $x. This guarantees the airline gets paid at least $x as soon as someone bids that. It also makes it more important to book seats early, but will of course, get much more complicated to execute. But what if it is this way. Where if $x is the bid amount to keep the next seat empty (say middle seat that no one prefers booking), then the bid cost of that seat and comes $x*y% thus some passenger is encouraged to book the ticket and hence the bid value changes dynamically.