I think there are a lot of factors that we can consider that have an effect on your bounty earnings if the project is taking longer than expected due to some delays. Here are some of them, the number of particlpants in the project, of course the more participants the lower the share you will get, another one is your rank, the hihger your rank is the more stakes you get so even if the project takes longer you get higher stakes than those who have lower ranks. We can alos add the supply of the coins and reached cap of the project. But once the project is successful, I know that all your time and effort will be worth it.