Here's how it works: You need to play 250 raked hands per day to qualify. For each day that you do, you earn 1 Present token. For every 5 tokens you receive you can trade them in for 1 Present.
What is the Present? That's a surprise. It could be any of these. [read review] is being very generous with the presents this year, with up to a $2000 bonus available to be won.