It's a neat org. Hearing voices isn't really uncommon and doesn't mean there's anything wrong with you and they're trying to raise awareness of that. Check them out. Hearing voices, outside the context of serious mental illness, is just one of those weird human quirks that some folks have like the cilantro gene or ear wax variations.
One of my favorite facts about auditory hallucinations is that they differ culturally. A burgers potentially paranoia inducing voices as part of mental illness seem to become helpful ancestor advice in other cultures. Which is obviously a lot less harmful and perhaps speaks to the burger psyche