they mostly seem to organize things like food and medical aid and supporting causes like unions or protests, they seem to be kinda small at the moment but i dont see anything bad about them, also if you want to know about another anti-revisionist ML org that its a little bigger there is Freedom Road Socialist Organization, i mostl heard good things about them, there is also an ML pre-party formation in its early stages called the American Council of Bolsheviks maybe they are also anti-revisionists.
good luck, i hope you find an org you like