I disagree. The nearby Sky Club in A is so much better than the Centurion Lounge that the only times I go to the latter are when I have a guest or aren't on DL for some reason. The CL is better than The Club, though.

Of course, this tends to reinforce the "guests = crowding" argument since it's the SC's charging for guests that's most likely to put me into the CL. A CL charge for guests would mean skipping it completely; then I'd pay DL's guest fees out of my airline fee credit....

I'd be fine with that as long as the passes came in a reasonable quantity and with a reasonable expiration period. One per month would work for me, unless they expired each month like the Uber credit; I think they'd have to have at least a 6 month validity to be flexible enough for my uses.