It will be too long to elaborate. In short, moderate communists accept market reforms as China's as a lesser evil. They see it as Lenin's NEP. Many of them are actual Soviet citizens who witnessed the Soviet Union and its collapse.
Ultra larpers are mostly young, though there are also young communists who support modern China to some extent as well as they support Mao's China.>What foundations do they have?
Is the party even real?
There are no actual communist parties in Russia now (by actual communists I mean those who at least publically declare that they will implement socialist policies at some sort after coming to power). At the moment, there are only communist societies and online communities and some labor unions (though most of labor unions under the government's control and don't give a shit about workers).