That is a brilliant idea especially for couples with children on long hauls.
Not many people will pay for business on their own dime (business class generally not worth the multiplier -- it's a captive market for consultants and the wealthy), but some might consider buying an extra seat an extra seat if the price is right.
Not many people will pay for business on their own dime (business class generally not worth the multiplier -- it's a captive market for consultants and the wealthy), but some might consider buying an extra seat an extra seat if the price is right.