Dear pre-migration Keebinetters, how can we NOT ruin kbin for you?
As a former redditor I am glad to have found a new "home" and I hope I'm not intruding. Nevertheless, we are all a huge migration that is bound to change how kbin works and we're bound to piss off some pre-migration Keebinetters. The fact you guys were here before and not in reddit makes evident you don't want this to become a carbon copy of reddit. From the interface to the group dynamics, please lets us now...
What can we do NOT to ruin kbin for you?
Essentially, Black Twitter is its own sub-section of Twitter that became prevalent around 2013 as a higher amount of non-white Americans online used Twitter. A lot of tweets involve humour relating to African-American Culture and commentary on systemic issues. The Wikipedia for Black Twitter has a decent overview of how it developed and its impact on social media. The subreddit was then made as a hub to share the funny, relatable, or insightful tweets from that section of Twitter. I hope that is a useful answer, I am a white Australian so my summary is based on what other people closer to that community have said.