There are a lot more variables than just signing a contract. Netjets sells shares in airplanes-as little as 1/16 of a share, which entitles you to 50 hours per year (1/8 share is 100 hours/year, 1/4 share is 200 hours/year, etc).here are a lot more variables than just signing a contract. Netjets sells shares in airplanes-as little as 1/16 of a share, which entitles you to 50 hours per year (1/8 share is 100 hours/year, 1/4 share is 200 hours/year, etc).