Huh, I figured they were rumors.

But it's fairly close to a tontine. But those are banned in the USA. But in those cases, rewards are split regularly between survivors. People who die with a tontine lose their share.

https://en.wikipedia.org/wiki/Tontine

I could see a movie about that, with living tontine holders sending out hitmen to remove other tontine holders, so they can get more money.

The "popular culture" section of the very wiki article you linked has several such.