It depends what campaign you are following, what rank, and how many token allocations. Every ICO will commonly have different regulation for the extended ICO, they may add the token allocation for the bounty program. However, not all bounty does that. here, we can analyze the number of the participant. If you join the social media, you may really get the few rewards.

But still even they've got a much higher share the numbers of rewards still affected, as the numbers of participants will increase while the campaign got extended, while waiting for soft or hard cap being reached, the bounty Hunters will keep showing up and showed their interest, the only matter is the amount of rewards allocated from each bounties and the said ranks.

It is usually depends on rank. If a Legendary/Hero and Senior members account the longer the bounty the higher the pay however for Full-member and below the longer the bounty the lower the pay will get since high rank members have high stake per week than the lower ones.
For you maybe u just stay than to waste the effort you made for the past months.

It actually depends on the rank. If your rank is lower the stake gap between you and other higher rank participants will be higher. Which means you will get lesser. However, this will be favorable for thos participants with higher ranks like, hero or legendary. Of course, it also depends of you consistently get stakes all through out the campaign.

Maybe or not, that depends on the project. Nearly 90% project will die in less than 3 years. That means if you have 10 bounty cryptos. It perhaps 9 cryptos will be zero, and the left one will give 10X or 100X returns.

Everything depends on the pool, how much the company is going to allocate, and on the number of participants, it happens that if the company is prolonged, then more money is added!

I STRONGLY AGREE
From my personal experience, I have joined an ICO which had lasted for about four months. Originally, it should last for up to a month only, but with the telegram news, it always ends up being extended. Only to find or that the reason why is because they can't hit soft cap yet. Though this kind of move can really be a courtesy to those who have invested their money and time for the project. But, of this ICO really had a very promising project, then, investors would've been more and they would've invested more too. For me, just leave three campaign and just look for other ICO that can pay you more within a short period of time.

anytime i consider joining a bounty i def pay attention to the ico timing how long it is how far away it is and the rewards for that bounty i factor all these in before choosing one.

That is correct. You have to calculate how much you get from a week's work.
If the bounty duration is very long and the reward is similar to a much shorter one, why would you take the longer one?