Vote.
PSL runs in elections but not as electoralists. They use it as a means of exposure and honestly it works. Between 2012 and 2016 they increased their number of votes by 10x and since then their membership has skyrocketed. The number of cadre is exploding since Bernie dropped out and they are taking up the mantle of the US’s foremost Communist Party.
Except PSL turned their votes into real on the ground organizing in disadvantaged communities while the Green Party turned their votes into seething liberals.