Just got mine timestamped at 8:15PM Eastern Time. Game runs 1/11 - 1/21/

Each day will be a different memory game. I completed today's game and got the message that I was now registered for the final prize draw. Then I had a chance for an instant prize. It was a scratch off and I didn't win.

How it works (taken from the rules section of how to play after completing your sign in info):

Once all the fields have been completed and the participant has clicked on "Play", the competition can be accessed. A window opens inviting the participant to take up the challenge. The participant then has a limited period of time in which to turn over the cards and find matching pairs. The time starts as soon as the player clicks on the “Play” button on the registration page;
5. When the allotted time is up, a window opens inviting the participant to see if they have won one of the daily instant wins. Participants must click on the “Play” button and then scratch off the spot to find out if they have won. In the event of a win, a pop-up window appears with the word "Won". In the event of a loss, the word "Lost" pops up;

So it seems that it will be a game of matching pairs (I think there were 16 cards). And it sounds like you can do the daily instant win even if you don't match all the cards because it states "when the allotted time is up".