[Timberwolf]

If you take "the idea is to give people a chance to share how they really feel in a vulnerable, one-to-one setting" and replace "one-to-one" with "small group" then this feels very close to the way many people used LiveJournal at its peak. Maybe slightly different in that the one-to-one stuff wasn't automated: people would have public posts in which they'd share more generic stuff, then curate private friend groups from people who responded in ways that suggested they would have empathy. These private networks would be where the more vulnerable things got shared and discussed.

Of course as a community it was much derided - teens and young adults finding their way in the world looked naive and emotionally immature from the outside - but it's interesting seeing someone trying to bring that pre-Facebook sense of sharing with a small and sympathetic group back.