Dear friend,
Yes, I agree with you. how is the bounty longer, that show us the delay, the difficulty of selling. We will receive fewer, and the project face to many risks of burn. This is a reason make us trouble and we can earn fewer money. Good luck!

I would totally agree with you on this. I feel the longer a bounty takes, the more time people have to get into it,  which will generally reduce the reward for each participant.
Imagine signature campaign where you can only participate in one at a time, if a good campaign takes long to finish, participants that just concluded other campaigns will be able to get into.

It appears to be like that so I can say that the long bounty is usually pay less, and there are examples of one week bounties that paid me $138, while another companies can pay me $1 per same time.

The total reward for a longer bounty campaign should be much higher than a shorter one.
A big disadvantage of longer campaign is that you have to waste lots of time if you find it is a scam later.

Depends on the number of participants ,the slower the more participants.

This is true. The longer the project, the more people join it. Because in view of the fact that now a lot of scammers, hunters trust ICO which have been leading their company for a long time.

Yes earnings in bounty now is fewer while it goes longer.lts maybe because of the prce is going down.But bounty is one of my hope to earn money thats why l will still continue because theres a hope in the future.

Its usually depends on the project, how many participants who joined the project, also depends on your rank, and also about their caps, if they are able  to reached their hard cap, and the price of the token. That's why you should read the project what its all about their rules and a background check about their leader.

There are several reasons that affect your profit upon joining in bounty campaign.
1. Depends on the rank you have, the higher your rank means bigger profit you can get.
2. Stakes, which means you will be able to do a task in order to gain a 1 stake. For an instance, the for Junior member you will be able to get a 1 stake per 1 post.
3. Joining in multiple activities in one bounty campaign might affect your earning also, a signature campaign is not the only campaign you can do but also Facebook, Twitter, Instagram or Translation, means more source of stakes.
4. If the campaign is successful and you have met the hard cap probably you will have a huge profit or reward of not, its either you will receive less or nothing.
5. More participants the lesser you can get because the budget allocated and divided on how the members there are in a campaign.