In general, this is so. The longer the ICO lasts, the more rates there are, but the less the tokens in each share. From this only the higher ranks win. In addition, it should be borne in mind that during this period you could participate in one or two campaigns, in which there would be their payments. However, it can not be unequivocally stated that the longer an ICO lasts, the less reward there will be. It depends on many factors and, first of all, on the prospects of the ICO project itself. Sometimes in such a long time project it is worth participating, because the project itself will turn out to be very good and its token will grow tens of times in price.

In fact, everything depends on many factors, on the type of bounty campaign, on the number of participants, on your rank and others. I always try to figure out what stake I can claim and from this I draw a conclusion to participate or not. If the bounty is constantly transferred is a bad signal for you, but even then you can get a good reward if you participate in the signature campaign and the main condition is that you must have a signature before the end of the campaign, since many participants can leave it.

all depends on the maturity of the roadmap along with their campaign, all projects are almost the same ie raising participants and ico within 3 months, it's normal

there are other cases where ico is extended, many cases like this are pressed because the project does not touch softcap hardcap and it's a bad alarm in my opinion.

there are also cases where the campaign time is only a month, here too many ico are failing due to less mature preparations to attract investors

there is no guarantee of certainty, I can only confirm from a large number of active campaign participants because I assume almost more than 50% of the investors come from their own participants.

Just stay from start to finish as long as you get paid with your efforts. There is a possibility that the longer the bounty campaign will end the fewer the coins we get that is because of the number of participants increasing and one more thing is that they have the right to change rates and rules within the campaign period. That had happened to me once where rates and number of posts are changing it's so anoying in my part because I expect to earn more but what had happened is that I failed with my expectations and we can do nothing about that issue.

In fact, it depends on which currency you hold.
If you've done a good bounty campaign, then it is recommended that you hold a longer period of time and you will get more rewards.
Otherwise, you have to sell it immediately.

The longer the bounties, the more work you'll end up doing and it also gives more time for people to register for the campaigns.  This does end up resulting with you earning less tokens.  The best campaigns are the ones that run for 8 weeks or less. 

If they postpone it and delay it couple of times, probably is better to leave. no money raised from community ,also you will get nothing .
so i will choose the hot project ,because project can sure success

I do not think you should die first bounty it because we no one know the price of the coin is how.The usual gift of his token will be expensive because it has reached the hard cap despite his little coin

In fact, I prefer to participate in such a limited number of activities, after all, even if the delay, I have a great opportunity to get a lot of rewards, unfortunately, the recent ICO delayed activities do not have this limitation.When we first started supporting this project, we worked hard. It was really sad that the high-level participants only  got involved after reaching the soft hat but got more than we did.

Yes, the longer the period the smaller the bounty reward for a lower rank bounty hunters since those higher ranks will join once it hits the soft cap. But as long as it's worth the wait since the project has a potential to be a good coin I think nothing to worry about. Indeed, as a bounty participants we don't have the control of the situation since the dev wants as many participants to promote their project.