Looking through my history on the Marriott website, I came across this during one of my stays:

01/01/05 - 01/02/05
Mystic Marriott Hotel and Spa
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* BASE EARNINGS - 1,892
* 30% ELITE MEMBERSHIP BONUS - 568
* MYSTIC MARRIOTT NOV MEO OFFER - 500
* TOTAL - 2,960


What is the MEO Offer? It appears to yield an additional 500 marriott points.

The stay was 1 award room and 1 paid room on New Year's day.