Recently it's been happening that almost every bounty keeps on extending with some even going into 6 months - 1year. It's very bad for a bounty worker because some projects even end up being scam. Anyways I think it is somehow good as well since some people have been cheating in bounties a lot.
If bounties keep on extending, cheaters will keep on working for wrong bounties for a long time and new hunters will also have the chance to join. This is because some bounties have so many participants and so we need to spread ourselves so that we can all equally earn. Also, the recent forum rules will help in taking care of so many cheaters or multiple people joining the same bounty.
Nevertheless i still stand by the point that bounty extensions are very bad.
Depending on the bounty should dictate how people participate. So if it is an ICO claim and they don't even have a main net or actual coins other than eth tokens people should be really careful. With eth token payments, people need to be sure there is liquidity right now during a bounty or else the ICO can just flop at the end of the bounty and participants are left with wasted time and effort. But there are other options too.
Regular POW or POS coins that have liquidity now may be an option to assure you don't get burned. Of course, I don't want it to sound like I'm advocating for just dumping bounty rewards on the market either. People need to do what is right for them and sometimes that means selling some or all of the asset but that may also be regretful later on if the value of the asset goes up.