Yes the key with bounties is the long term. 2 years after the end of the ICO is a minimum.
But I think it is very hard to become a millionaire only in participating in bounty campaigns.
I cannot agree more with you. Dont participate in bounty campaigns to earn money you need imediaty. See it at investing time for the future. Hold your coins for 1-2 years and get a good payout then. I only participate in bounty campaigns if I believe the coin will be worth it in the future