how long the Bounty campaign usually gives the Prize
there is no fixed period or time of bounty campaign payouts . bounty are held for ICO of any project in mostly cases , so they will send tokens only after ico , in few cases payout is in ether or btc so they can pay you during ICO also .
for proper clarity you have only one option that is read the bounty thread properly and ask bounty manager , only he knows exact time .
I already studied this question and came to the conclusion that every Bounty company has its own terms and rules. Therefore, even the distribution of tokens begins after a different period after the end of the company's ico. Very rarely, someone pays talkin 'after a week or two weeks. In general, you need to wait at least a month.