If you bet $100 on the 49ers to win it all, and they do, you win an additional $225.
If you bet $100 on the Bucs to win it all, and they do, you win....$6000 (from most sports books).
That struck me as odd, as well. This is the best I can do:
People love heroes and Allen just played some great hero ball against a very hyped Dolphins team to snatch the division crown.