They already raised funds but still extending their bounty? it seems shady. Well bounty extension sometimes are necessary for their part to spread awareness however its not good for hunters side because they are hoping to get their rewards soon but if the campaign keep on extending hunters cant leave or else they will lose their stakes. If you can bear the rules of the project then continue to do your part however if you see an indication that it will turn to another scam then its time to move on and quit.