Okay, so thinking upon it, I'm going to try to assign some probabilities and see what the odds may be.
Clicking on the link, I count 56 games listed. One person has won the 50/50 draw 4 times (presumably, as I didn't count that)
Just based upon the amounts won on Jets games I've been to, I'm guessing the odds of winning one 50/50 draw to be about 1 in 4,000.
So what are the odds one person has won 4 times out of 56 draws?
Here is where I probably make an ass of myself
The odds to not win a 50/50 draw: 3999 ÷ 4000 = 0.99975
The odds to win 4 out of 56 draws = 1 - (0.99975^(56-4)) = ~0.0129175, or about 1.3%.
So a bit unlikely, but not improbable.
*waits for stats gurus to point out his mistakes*