I'm done with Marriott... I'm going to do a status match with another chain... here's the response I received from their "customer care" team to my concern re: their wasting my time with this program only to un-invite me:

"Thank you for your message regarding the Marriott Voice survey team. We appreciate the opportunity to address your concerns.

We apologize that you have not been contacted regarding your survey response. While the contents of your survey are not available to the Internet Customer Care team, we would be pleased to offer assistance and ensure that your concerns are brought to the attention our development group.

My Marriott Voice is an exclusive group of Marriott Rewards members who want to provide input and insights to shape the future of Marriott. Panel members have the opportunity to share their opinions and experiences about the most current and important areas related
to Marriott's products and services.

Although, the invitation you received was from Marriott, another third-party service provider actually administers the survey on our behalf. Please know that your comments are taken seriously and will be reviewed by people who can make changes to this process.

We appreciate your loyalty as a Marriott Platinum member and welcome any additional comments that you have about the matter in the future. Thank you for choosing Marriott."

Amazing anyone in corporate thinks this is a good way to handle this...those of us who fill out the survey who are uninvited should receive a message like "Thank you for your participation in our survey. At this time we have received enough responses from other customers. As a thank you for your time however, we will be depositing x miles in your Marriott Rewards Account. Thank you for your continued loyalty blah blah..."