Ok so if they seem to be third place in whatever area they’ll leave so as to avoid vote splitting allowing a party with less than half the votes to get a full seat of power. The centrists have been a little more vague(on brand) but seem to get the idea and might do the same.
If it actually works then the country would likely be left with a center or left minority government and enough total seats under control of center and/or left that a coalition could keep the fascists from doing too much damage.
As a fan of minority governments that can’t just bulldoze stuff I’m down, but it’s a dangerous game. Centrists aren’t known for follow-through on tough choices.