Games with Viewers Interactivity during streaming

Hello everyone,

Would it be interesting to allow viewers (during streamed gapes @ Twitch) to engage in certain rounds. Adding interactivity whereas viewers can for examplespawn more enemies, according to a set of rules.

I'm trying to explore the viability of implementing such features (some games have tried some basic implementations, some others are built around the concept of an arena-like game where the show master controls the scene).

Thanks for your input