Only one time use.
Think of like world leaders, celebrities, ya know 😉. Are you gonna make them do some embarassing things, or illegal acts.
My answer:
spoiler
Take control of an NSA agent with access to the most powerful hacking tools, hack everyone’s phone, install a program that randomly have a popup at random intervals, the popup message says “I’m watching you”. This also tries to spread itself to any other phone it can connect to. Pure chaos 😈
Pretty sure I can do this in a minute, depending on how good the NSA tools are.
Vance doesn’t have Trumps cult so he wouldn’t be able to get away with any sort of Trump stuff. He’d try of course, but deffo get a lot more pushback.
Vance is an opportunist and would cheerfully go along with the Project 2025 folks in order to be their figurehead and grab a bunch of loot. And they’d be happy to have him as a figurehead, so long as he does what they tell him to.