Lifetime SkyClub or Lifetime flying pass pricing should be based on age. "Statistically" someone 30 yrs old is going to use the perk(s) much more than a 60 yr old flyer.
For SkyClub:, now an AMEX PLAT CARD (<$600, with incentives, much less net) gets SC + Centurion Lounges without a significant "upfront" cash outlay, I don't see a Lifetime SC pass being a good deal for a passenger; will a SC Pass survive future bankruptcies?