The time frame for the bounty campaign is now very long. In my opinion, they spend that much time because they want to reach their caps. Some use two to three phases to reach their caps. Then the bounty payment is also long, even have to wait until their caps are reached first.
Bounty campaigns are an easy way to earn Bitcoins and that too in a short period of time.Bounty campaigns pay us weekly and according to our ranks.So higher the rank more will be the payment.But some bounty campaigns pay at the end of the month.It is also a very long process as your rank rises very slowly and you need to post and your activity takes a lot of time to increase.But for a newbie in Bitcoin it is the best way to earn money.Bitcoin is a money making machine.