If the odds are small, we can try to participate but if it's over $1 and we have a limited balance, I don't think it's worth trying. But each of them must have different thoughts and will try it if they think it's worth a try.
This bonuses is thoroughly calculated by the casino before they introduced it to their casino. I doubt someone can take advantage of this bonuses with low risk considering a user will play normally without using multiple account to cheat.
Only whale players can take advantage of this kind of bonuses because they are normally betting using high amount. Their participation is just a normal game for them unlike us that needs extra money just to qualify and meet the requirements.
Even if you are a whale then it wont really be making out guarantees but just like been said that there would really be differences on how much things been given out.