Originally Posted by njmcgreg

Air Canada does something similar, not for carryons, but for everything else under the sun that they charge for. If you want to check one bag, it is included, if you don't want to check any bag, you can opt-out with the booking and save some money. You can also pre-purchase a meal, buy a lounge day pass, or (gasp) opt-out of FF miles. It can't be that complicated to work this into the booking process as they've been doing it for years.