It's how they lure you in.
I believe it's called "BAIT and switch."
The Big Bang Theory Season 4, Episode 3
We're BAIT. They're using us as BAIT.
Money Heist Season 1, Episode 4
We're BAIT. They're using us as BAIT.
Money Heist Season 1, Episode 4
SANSA: You want us to use you as BAIT?
Game of Thrones Season 8, Episode 2
Nah, G-Harmony recommends after two hours,
it's time to cut BAIT.
The Big Bang Theory Season 10, Episode 16