This seems a lot like a case of poor proofreading by the oneworld web team. I think the sentence is supposed to say something like "AAdvantage members who have top-tier oneworld status...".
Such a drastic change would not have been announced through a footnote on the oneworld website. (And anyway, it makes no sense. AA makes plenty of revenue on oneworld elites' lounge access — why would they put a stop to it?)