When you click on "Marriott Rewards Offers" on your main page you arrive at the various dated offers. First would be listed "premier" offers followed by all other offers. Most of the premier offers have now expired leaving only one. Usually you can find 8-10 of them at anytime, many of which are very useful. Is Marriott phasing out these premier offers?
After looking into this a bit further, I was able to find out that they are not going away. Since these offers are for specific properties or regions, they tend to come and go. When a new batch of offers are released, we typically post them here on Insiders. Here is the most recent post, Member Exclusive Offers - September 2, 2016.