Vote: Cayvie
You suddenly chose Masquerade last night, eh? Hmm... no. I can't see why you'd do that if you were deck aligned.
Here's the situation. Me and Cayvie are both Black Markets. We don't know each other's alignments, we can't talk, but we know Black Market is both of our roles. Our role involves having some choice in what we do - I won't give details, but basically the mass of points Cayvie and I got was because of a lucky break with our choices, which we didn't pull off tonight. Cayvie's choice of roles last night only really makes sense if he had additional knowledge about roles in the game, which he certainly didn't have if he were town, as he chose the double-voting power night 1 (which I also did - it came with +VPs!). Ergo, he's likely allied with scum, in some way. As while YW can be a useful town role, it only is if it's hidden. And he came straight out and said he had it.
So in short, I'm claiming because I think it probably nails scum. I'm witholding a lot of information about my role, how it works, etc. because I see no reason to tell the mafia (or town) that now, but in short, considering also his play yesterday, I'm fairly confident in this.