If the campaign getting longer, its probably means that the sale not reached the target. The longer the bounty would mean fewer earnings because the participants would be growing But it's possible that the team project also raises the bounty rewards.

It depends on the number of participants. If the bounty campaign has few participants it would be profitable  but if the more participants the less you will get.
And last but not the least everything depends on the outcome of the campaign. It seemes to me that ICO that was delayed so many times cant be very successful. It is my opinion

Not at all, your friend is completely wrong, it is instead the opposite, the longer the campaign, you will get more token. And most of the time, the longer the campaign increase the success chance of that ICO. But still you need to do research on that ICO, their team, their whitepaper, roadmap, etc. But my point is when ICO do a long run on campaign, they usually pay more token to the participant.

the more the people in the bounty game the the lesser is the bounty for everyone and the longer you the ico takes time to release the more its tiring so it is completely your decision to either leave or stay

Indeed. I completely agree with the fact that the longer the bounty campaign, the less you earn. This statement can be shown in a simple example.
With the same bounty and reward conditions, you can wear a 1 month signature and earn $ 1,000. Or you can stretch a similar campaign for 6 months
and also earn 1 thousand dollars. In this case, your monthly income will be a little over $ 150.

It is depended on company's position, if they have set the limits on quantity of the members. If yes then the profit is more, but if there is no limits , in the end of project there are too many members and the profit is very low.

This has happened to me as well. Originally the bounty campaign was supposed to run for 1 month, but they extended it by another 3 months. The reward remains the same, so in the end it is the participants who lose out.

No this is not true if the total pool of bounty is small, and the payment will be small, and everything will hang how many people participate in the bounty. I recently participated in a 2 month bounty and there paid well))

I think it depends on the bounty campaign itself, usually, they determine how much participants will get in the first time they started the bounty. sometimes, the rewards are big if we can stay for a long time after the bounty is finished, sometimes the short-term bounty can also give a big bounty. and it's our choice to join in whatever bounty campaign and I think we should know how much we will get that rewards and if we think that the rewards are not good enough for us, then we don't have to join.

I think there are too many participants in a bounty so that the number of allocations is small. you can see at this time one gift has thousands of participants, take the example of social media gift the number of participants can reach 5000 participants. total allocation in for the participants that you can predict how you can get it.