As a long time player (since day 1) Spending it on lucky wheel wouldnt make you * in fact since you are a F2P you have more of a advantage or 'luck' to get the rare ninja that is on the wheel . Since you dont spend ingots you have a waaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaay better change of getting said ninja since the game wants you to spend and what better way than to favor F2P and * over P2W people