I doubt their performance will matter much in such a short notice for the first round, since they were already trailing behind at 8-10%, but whoever joins together with them in the second round might get a good boost. It seems like Luiza González (the leading candidate from the Revolutionary Citizen movement, name unrelated) is taking this issue very seriously (interview with her), while the 2nd place Topíc can barely be found talking about it (despite framing himself as a soldier/security kinda guy).
González-González alliance might be incoming during the second round to confuse all the foreign observers. Anybody with boots on ground/more familiarity can correct me there?