That would depend on the coin/token's value when they get listed on exchanges like Bittrex or Binance. And in the bounty contests there will be a ranking system. People who would do all the daily tasks and refer more people would have higher rankings will have a lot of stakes. If you do all the tasks and refer a bunch of people you can make anywhere from 50 usd to 3000 or above from a single contest. More contests and more activity means more of a chance to earn more.