Quoting from the article: "Just four players hit 500 home runs by 1965, but in the last 15 years, 10 new members joined the 500 club."
This dilution is probably the reason AP's upcoming mark is getting less attention - at least at the moment.
As for Card's offer - they offered what they could fully knowing if he accepted it would be a big hit to a small/mid-size market team.
I believe Mozeliak also knew they'd be potentially hurting the franchise while paying for a declining player - clearly a great declining player - but still declining.
Moreno had no such qualms and bought AP, all his future milestones, and his LAA Cap in the HOF.
AP got a boatload of money.
I guess it worked out for all.
I think the interesting aspect is how it will be noted in STL.