in my opinion, sometimes there is indeed a bounty manager that indeed he calculates his stakes at the end of the campaign even sometimes a week after the campaign or bounty is finished so it's only natural that it happens if the bounty is true or real (No scam). it often happens and maybe you can be calmer and just wait but if the bounty is not a scam. that is something that is very common as long as it depends on the bounty and the bounty manager itself.