Please open a ticket if you need help with anything related to the plugin, I usually do not follow the plugin discussion. The wiki presents the main plugin features as well as the main API methods and classes, don't hesitate to have a look before opening an issue to make sure it does not have the answer you're looking for.
BountyHunters is an open source project and aims at providing an all-in-one bounty solution for spigot servers. If you would like to contribute to the project, you can buy the paid version over Spigot for 9€ however a free version is available over Spigot as well. This repository corresponds to the latest premium build, that means you are also free to edit and compile the plugin on your end.
Bug reports and feature suggestions keep the project alive too!
Useful links:
Maven Integration
<repositories>
<repository>
<id>jitpack.io</id>
<url>https://jitpack.io</url>
</repository>
</repositories>
<dependencies>
<dependency>
<groupId>com.github.Indyuce</groupId>
<artifactId>bounty-hunters</artifactId>
<version>master-SNAPSHOT</version>
</dependency>
</dependencies>