@stillnotahero Mastodon is basically a twitter clone. While kbin is like a reddit clone. However, they're both part of the "fediverse" and so the content is shared between them. On Mastodon you have to follow particular people, or search tags, to find content. Here on kbin, you can subscribe to "magazines" which work like subreddits. you can also follow people like how twitter/mastodon works. Magazines auto-sort hashtagged twitter-style posts, so we get them in the "reddit-style" format.
On kbin there's "threads" which is reddit style stuff, and "microblog" which is mastodon/twitter style stuff.