Yeah, seduce/manipulate gets wonky for me sometimes. Mike's an expert at reverse leverage deals, where he wants someone NOT to do something and then promises that he won't do something in return, but now there's concrete proof of not doing something required and it's all... blah.
How I do it, as MC?
The way the move is written, in order:
When you try to seduce or manipulate someone:
1) tell them what you want and roll+hot.
2) on a hit, they ask you to promise something first, and do it if you promise.
...with leverage being a question applied to the asking of the promise, taking into account the context in which the manipulation/seduction took place, the
telling them what you want.
Getting all concrete about
exactly what the leverage is prior to the roll, like we're setting stakes or something, can lead to weird/wonky stuff.
For example:
"June, baby, how about you let me hold that key card to the armory for a bit and I'll let you hold ... something else, gnome saying?"
Roll. +10
"Eh, you know I don't swing like that, babsy. But I know why you want in that armory. Joe's Girl done fucked up, right? I hate her too. What say you let me have that sweet, sweet sniper rifle instead? That's more my kinda gun."
If the PC promises or does it, then the NPC does as well.
And yes, my NPCs talk like that. You better believe they do...