Hiring a Flash ActionScript developer is beneficial if your project involves Flash-based applications or games. They have expertise in creating interactive multimedia content, enhancing user experience. They can develop and customize unique animations, web applications, and games, making your project stand out. Their skills in ActionScript, a powerful scripting language, allows for advanced functionality, flexibility and interactivity. Despite the phasing out of Adobe Flash, there's a need for these developers in maintaining or updating legacy systems or converting Flash content to newer technologies. Their understanding of Flash can be crucial in these scenarios.