I understand why so many people show interest in these giveaways, contests, games etc, but the truth is that the chances of winning them are slim(If the numbers are big) just like jackpots, raffles etc.
The various contests and games in the games and rounds section of this forum provide better odds of winning if you ask me.
What about their Christmas-New Year art contest? It was a bit more than one month long, and there were only 33 art works declared. Some users even managed to present several art works. 10 winners. The chances to take last place and get 300 bucks was around 33.3%. By looking at the works, if a participant put just a little effort and don't participate just to participate, his chances to win were rather high.