It depends, really. depends on how much money the ICO is willing to hand out to bounty participants, and how successful the ICO was. After that of course it depends on the number of other participants in the campaign, what their ranks were, etc. It's very difficult to give a number.
And it also it depends on the price of the token when it reach an exchange. You can't really rely on ICOs price since some doesn't really justify it so you need to research like what is the supply of the coin and how much will it have then by dojng this you will comeup with an answer to that.