At the risk of stirring up sectarianism, adbusters (which itself as a movement is a direct descendant of situationism) illustrated the limits of that sorta New Left retreat from conflict in the political and economic spheres into the cultural sphere. This also applies to adjacent movements like the Billboard Liberation Front etc.

That's not to say that there is no value in taking the fight to the cultural sphere but ultimately if your entire program is just the expansion of countersignalling against the behemoth that is the PR industry then you're not going to achieve much because under capitalism, the house always wins (so long as you don't flip the table.) Unfortunately they are all dead-end movements as far as I see it.