It’s annoying AF, much like the habit of people posting comments consisting of “Based” all over the place in recent times. The latter is dying down fortunately, and I hope the R meme meets a quick and painful death very soon.

If it’s not obvious, the referenced site is https://redditmigration.com .

A handful off the top of my head (not sure if these sub names are case-sensitive in any way or not):
QAnonCasualties
PeopleofWalmart
Engrish
Spokane (the city in WA)
Seattle
Boston
AntifascistsofReddit
Scala
Fsharp
fatlogic

I didn’t think to save my subscription list (duh) and I’ll be damned if I’m going to log in again to do so. I’m done with Reddit at least until they fire that absolute ass of a CEO and back off on all of his dumbshit money-grubbing schemes. That means ‘probably never’ and I’m 100% fine with that, fuck them and a hearty hello to the fediverse.