Originally Posted by bocastephen

There is a different, yet related thread where our Lurker commented on how both SPG and properties were able to determine that a Plat was a full "25/50" Plat or received the status through a free offer/co-brand opportunity.

That is the gist of what I remember from that thread and is the key to the OP's inquiry. I cited this distinction as part of my defense of SPG's handling of tier 'dilution' vs. Hhonors' approach, which is to gut the benefits of the diluted tier.