The rules vary but you must be in the top three percent of Elite members in terms of number of nights in a given year. In addition you need to stay over 125 nights per year three years in a row. But renewal varies--this year it is down to 100 nights to renew.
Hope that helps
I doubt that it will, actually. The Platinum Premier status is "unpublished". That is to say, the website doesn't even mention that it exists unless you are one.
While I'm sure that there are criteria in Marriott Corporate for attaining and retaining PP status, having the requirements nonpublished not only gives Marriott the ability to modify them as required, but also adds something to the cachet of the status, as it is (for all practical purposes) "by invitation only".
Here's some leisure reading on this topic:
I was aware of most of these statistics, but thanks for the pointer nonetheless.
I was actually (or so I was told at the time) part of the very first group of 50 PPs worldwide (though, to be fair, I really don't know whether this was because of my extraordinary loyalty, or because my last name starts with a "B. ), and the status just "appeared" on the hotel's guest printout one day with no advance warning. It was actually quite some time before I got any formal acknowledgement on my new status, but with absolutely no indication (other than boiler plate about my loyalty and suchlike) why I was chosen.
It seems pretty clear that the exact requirements are pretty fluid, and likely reflect whatever criteria are required to select the "top 3%" of Marriott's customers. This actually makes sense, and makes PP status totally unlike all of the other levels, which have a published, objective goal. Or, put another way, it is theoretically possible for each and every Marriott customer to attain Platinum status merely by staying 75 nights in a calendar year (with or without rollovers). But even if every Marriott customer attained Platinum, in theory still only the top 3% would be offered Platinum Premier status.