You keep all your freq flyer points for status from your positive space to and from your cycles. That's it. But, you can fly on company empty legs for free also. Look at the empty leg schedule, see if anyone is in/out of an airfield near you and you can see where they're going next. Now, they'll get you there, but there won't necessarily be a return empty leg. The schedule is too dynamic, but you can always go someplace neat and use a rental to get back to a hub to airline home. It's a pretty solid perk I think.