Fliers certainly aren't happy about the new reality of airline nickel-and-diming, from paying for meals to entertainment to WiFi, but that's not stopping them from buying, the LA Times reports. A new study by travel research company PhoCusWright found that sales for all onboard extras were on the rise. So what are we buying? The percentage of leisure travelers buying in-flight food increased from 28% in 2010 to 40% in 2012. Inflight movies and other entertainment also jumped from 15% in 2010 to 23% in 2012. And seat upgrades are on the rise as well with 23% shelling out in 2012 versus 13% in 2010. Fliers ages 18 to 34 shell out for extras the most, either because they don't remember the days when the services were included, or because they are more accepting of the new fees than older travelers, the report says. What do you think? Have you started to give in to airline fees? Which extras are you most likely to spend money on?