Day ending early: Means we talk less, so we have less of people talking to use as evidence for or against other people later. Means the mafia has an easier job later. And even an unneeded vanillager lynched off would cost us in terms of numbers, though I'm not arguing in favor of CBT right now... Losing numbers means that we're closer to defeat, unless the vanillager was actively harming the village. BG means Bodyguard = prevents mafia from killing his target.
Anyway, that definitely makes sense, but the discussion turned to "CBT IS SCUM!!" more than anything else right now. Whatever though, if cbt is lynched then I'm good.