A prominent /c/Risa shitposter accused the mods of transphobia, loudly quit Risa and started their own meme community (and later deleted the comments after any evidence of transphobia failed to materialize).

Around the same time, a Risa mod removed some particularly low-effort posts despite Risa having "no rules", which upset some users and so they fled to the other guys' meme community.

Now there are two Star Trek themed meme communities.