I would actually take the post seriously and try to do well. Because, let us not forget, that C's doing well splits the right wing vote and under the Spanish electoral system that would be good news for the left.
Tbf the effect is maximized when a party is polling at around 7-9%
With Cs polling at 2-3% they will hurt, but not as much as they could. Tbh I don't even know if they will manage to get seats. Then again having Arrimadas as the lone MP, completely ignored about everything, would suck for them too