To join it we need to wager at least $10 to get 1 ticket, but if you bet in any football match with the same amount you will get 5 ticket. This mean it's more profitable to bet on football matches than the other sports or games if you're looking to win this contest.
It seems that you forget to take into account that your wager will only count on sportsbook after your bet is settled. A regular slot player would be able to spin for for hours and get the same amount of tickets that you got from your sportsbook bet but yeah its a pretty decent offer for someone that love betting on football though