500,000 miles for about $12,000 without having to do a lot of MR's at $.019/mile (after taking into account 100% bonus, double the cost for the actual miles needed to accompliash this,) in return for lifetime PLT plus 500,000 miles? I am sure that if you have some future use for these, the economics are sound, as the cost/miles is about what you would pay for butt-in-the-seat miles without all the Prep-H costs.