Competition are always fun and entertaining most especially when you're in a prediction/betting tournament. It will surely challenge your inner "sports analyst" abilities. I have never done much of these kind of gambling tournaments. I remember only twice or thrice have I tried, but all I can say is It can give you mixed emotions like it was fun, challenging, disappointing (when your team got upset/losses), and pressuring as well. Everytime you lose, It'll make you strive to come up with a better game match up analysis.
However, I had fun betting on my own as well, without getting pressured looking at the tournament ranking lol.
Although, some people really love challenges and that's what motivates them to continue analysing games and placing bets.
People have different preferences when it comes to gambling/betting.