I know the lemmygrad.ml instance claims to be Marxist but I don't think they're generally taken that seriously (and not to be confused with lemmy.ml) - is that what you're confusing? Apart from that, the federal nature of Lemmy means it doesn't really matter what the creator's political beliefs are.

Nah. I think the ".ml" means Marxist Leninist to them. At least that's what one of the tanky types I chatted to on lemmy.ml said.

I’m pretty sure the domain name might just be a consequence of it being free to register for a year at a time through freenom, and being not super known for spam like .tk

One of the people I was taking too was complaining that people were surprised that it was tanky when it was "obvious" from the domain name that it was Marxist Leninist.

Yeah it's about as "obvious" as .us for urine sample