Well some project could run for that long but if the weeks was added just like that with no tangible reason then it raises red flag. Something is really not going on well so you can just give it a break senior trust me most of these projects end up been dead.
Most likely a project will just fail anyway, so instead of wasting time still doing the job, it's better to just left the project and look for another one.
The reality in bounty hunting is that you'll not gonna make profit with every bounty you'll participate, some will fail while some will succeed, so look on the successful bounty and just forget the failed one and maybe learn a lesson from it.