This is a great way to promote because bands can help each other out. If you know of a band that sounds like yours, you can easily reach out to their fans and expand your fan base. From a fan's perspective, anything that is promoted through Headliner.fm is okayed by the band promoting it, so you can trust it. If a request is sent and the band doesn't think they relate to it, it can be denied and their fans won't get bothered by it.
Source: hypebot.com, headliner.fm/
by Rebecca Weyhrauch