Suspicious post. It's incredibly standard (like 99+% of games) to make mafiakills free, the OP even states that mafiakills are free this game. This post reads like mafia trying to convince town that he doesn't know anything about the mafia abilities, or trying too hard not to scumslip.
I'm going to explore this because you might be town. I am town, and of course everyone gotta figure everyone out, but I don't want you dead if you're town and you seem a likely elim.
I like a couple things about your attitude; your pointing out that first game of yours I started peeking at you were maf in, and your claim here you're town is hilarious and golden, I love it.
This is my home forum, and I don't remember most of my 5-8 decade ago games when I was a newbie, but I was almost always town and the town games are the ones I remember.
Since coming back, I've been mafia exactly once, in a 5-player game where I expressly had a nk and a night vig (all townies also had a vig) and I asked if I could use them both. Elsewhere (I was asked to go to champs, I played a lot there to prep and still play elsewhere a bit) I've been maf a few times, but only in games where NK was the only action I had (and it wasn't clear that if I had another action it would be a choice or not or if my NK was free. Nobody told me my NK was free, I'm used to mods carefully stating free on anything that is free).
I'm town. I am not staring at the mafiakill and thinking how to use it. What I did there, that you say sounds sus, is answer Oliver, who focused on how a fruit action could be used to give cover to the mafia kill. I don't want him to fall into that trap for a bunch of reasons that could hide the maf kill even if it wasn't free, I'm not even thinking about the OP and the fact the mafiakill's free, because I'm worried about the mechanics I've known and watched.
I've also watched MANY games here where my fellow players en masse worked to track who did what, because that proved who didn't kill; in NQT's BYOS game I was flipping out about people talking about even imagining they could track the actions people were taking and who might not be night killing because they were doing something else - in that game by the time it ended (N3) I had unlocked 17 'each night' potential actions and could have continued to unlock new ones that would have also been free, some free for me to use twice per night.
So I'm not thinking about the actual NK, I'm thinking about what I've seen and done and how known games work here.
This is actually Imp being Imp, which you won't know. But I'm going to be Imp, and town, all game. If you're town it's going to be quite useful for both of us to survive, and I'm concerned you're a likely early elim, maybe a ML, and I want us to have a chance to fairly eval you.