Mycah I know it's not exactly what you are looking for however, someone did something similar for a charity event that did use real money donations. So if you tweak it to substitute real money for your twitch points, and/or ask permission via gms. I think you'll be ok.
Link from welgrim's charity event:
https://www.project1999.com/forums/s...25&postcount=1
See you in game.