Not sure this has been discussed before.
I tried to order new "Elite Thank You certificates" but got the message "It looks like you're not eligible to request Thank You certificates at this time."
Emailed SPG and was told as Lifetime Platinum I am not eligible unless I reach the usual 25 stays/50 nights per year.
A bit of a pity. I liked the cards as a nice way to appreciate great service. And I wonder why as LTP we're apparently not deemed worthy enough to hand those out anymore. Looks like to SPG we're not "Elite" enough anymore...