Huh, I've definitely run into other explicitly Marxist-Leninist places online where you have to fill out a political questionnaire. Some just want to weed out reactionaries, ultras, Trots and adjacent cranks, and such, some are probably full of academic cranks and Second Internationale types and want you to answer extremely complicated theory questions because they want only well read Marxism nerds, they don't want to deal with people still learning the intricacies of the theory, or people who don't quite "get" Dialectical Materialism but still think MLs are right about a lot of practical day to day stuff. (When you gotta copy the questionnaire into a text document and fill it out, in order to keep the question and answer numbers straight, you know the theory discussions are going to be over the smallest minutiae, or the admins are sick of banning baby leftists for stupid takes and want to just screen them all out at the questionnaire.)