As a bounty hunter, it is really very frustrating, when a bounty participant does not receive anything for his or her hard work. It is the cruelest thing that, ever could happen to a bounty hunter. It will demotivate the person.
But why are we not receiving tokens anymore? What is the main reason behind it?
I guess you mean that projects pay out rewards with a long delay - it happens because with the time of price drops they need more time to collect funds. If it happened that you did not receive the prize at all, the two most common reasons are:
1. The softcap has not been reached - so the project will not be implemented at all because of insufficient funds.
2. Developers are scammers.
Before you join bounty campaign, you should always take the time to make research about the project. It will help you to avoid such situations.