Join Date: Feb 2004
Location: Perth, WA, Australia
Programs: QF Gold, VA Plat, IHG Plat Amb, LCAH Gold, Hilton Diamond
Posts: 3,934
Platinum refers to your Priority Club level, and for an ambassador will either be gold or platinum (and in your case, you must have been platinum prior to buying Ambassador membership).
There are only two levels of Ambassador - the other being Royal Ambassador.