I have observed that most bounty campaigns nowadays are not complying with their tagret end date. No problem with extend the campaign but man, these projects are now imposing hunters to not remove their signature until the end of the campaign. This prevents participants from leaving the campaign. Poor participants cannot break free from this and to look for other productive campaign. They have no choice but get stuck and post for these companies. Did you have the same experience? or Do you observe the same pattern? please enlighten me.
You need to understand that there are many different bounty programs on the market today. And they all set their own rules, which participants must learn. Unfortunately, there is a risk of changing the rules in the middle of a bounty campaign, so I recommend choosing a reliable project with a good development team.
You cannot predict the project, in the beginning, you just have to wait for it and after that, you getting a deep understanding of the project. Although now many good projects have included these rules and consistently extending the campaigns date.