Originally Posted by
eccentricfusion
I linked my account once to get gold using my AMEX plat but never had to renew it since, I just stayed a gold. I don't remember ever having to renew the linkage, it has been at least 4 or 5 years that I had it on there without having to adjust it. Might be different for other though, but I've never had status fall off.
IIRC for some of the status benefits you had to call Amex CS and they would conference in with Hilton or SPG or whoever to confirm your accounts and make the link. I haven't had to use Amex for status the past couple years so this info may be outdated.