From my understanding, a pair of letters either stands for something or represents a country. Since Lemmy is not based in Mali, then ML must stand for something.
Unless you get a response from the site admins, anyone's answer is pure speculation. No one is going to be able to say, definitively, why .ml was chosen, except the site admins.
My theory is: .ml domains used to be offered for free. So they made lemmy.ml for free, as it was just a toy project. Then, they upgraded to the paid .ml domain (which is how they managed to avoid the recent free .ml purge).
The "its Marxism-Leninism" could be true, but unless you get an answer from a site admin, everyone asserting that it's true is talking out of their ass. They don't know any more than you or I know.
@favrion@1stTime4MeInMCU tankies is derogatory term of communists who regardless of reality excuse everything that authoritarian governments do. It was coined to describe Stalinists who defended USSR rolling in tanks on Hungary in 1958. They're the mirror image of MAGA cultists who will be the first to defend Trump when he inevitably goes ahead and shoots someone in the middle of 5th Ave.
My 1st interaction with a tankie was a Canadian youtuber who made videos defending North Korea, not satire