Sure, and they believe that agitation (to THEIR correct way of thinking, breaking down ideology through STRONG ARGUMENTS and promoting the advancement of self-interests) is the absolutely only way to... do nothing. Because all you need is to advance scientific debate and promote reason and the enlightenment, so it doesn't really matter if there is any result in their agitation, be it socialism or not.
It's an intellectual ultraleft (actual, not in the insult sense) circlejerk of absolutely insufferable people who want to be 18th century enlightenment thinkers. Because clearly, if you don't agree completely with their argument, you simply don't understand it enough yet, and have to keep debating.
Eventually, GSP supporters either burn out / are thrown out by the group like someone like Renate Dillmann or base basically all their political knowledge from reading GSP publications and discuss them with each other to write more GSP stuff.
