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ph_il
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Silver Level
True, if you only aim to min cash, then it isn't worth it. If you play to win and take top 3 spots, then it's worth it.It's not, because the min amount you wil win is what the add on is. Usually if you have 8BB, you will lose the money you spent on the add on.
If you have 8 BBs and 20, you now have 28 BBs. That puts you in a much better spot to finish better than 8 BBs. If you double up, that's 56+ BBs vs 16+ BBs.
Again, it depends on your MTT goal.