I thought what OP was trying to figure out was how to find out about events that are open to Platinum cardholders that he is only discovering from third-party sources after the fact. His aim is to find out about Plat events (I'm expanding to all benefits/entitlements/events) while he has an opportunity to take advantage of the offers.

Of course you can't have 5000 people go to a Bazaar 150 event, but that's a matter of ticketing. The issue in my eyes is that events/benefits are available but not publicized.