My wife and I both played.
I sent all of my entries on 2/13. I got 1 email 2/21; 92 emails 2/22; and 1 email 2/25. I won 2 x 5000, 1 x 2000, 2 x 1000, and the rest 500 points.
My wife mailed 45 entries on 2/13, and 50 (1 extra in case one gets lost) on 2/16. She got 42 emails on 2/22 and 51 emails on 2/26.
This is where it gets interesting. In redeeming the 51 emails that she received on 2/26, she got 5 that said that she didn't win. Like others wrote, she hit the 'back' button and replayed and won. I wasn't sure if she was really replaying or just playing the 'next' entry since it is the same link for all emails. Anyway, she ended up getting 51 winners. So it seems that hitting the back button and replaying really works.
Anyway, overall she won 1 x 5000, 3 x 2000, 1 x 1000, and 88 x 500. She's still waiting for 1 last email.