Son getting paid to play video games

My son is 16. When he was 14 his dad let him join twitch so he could stream his gaming. He started being able to make money not too long ago and I don't really like it. 1. I don't want my son to think he can game as a full time job. I know there ARE people who do that and make lots of money but that's not just what I want for him. I've been with a gamer guy. Never again. Also sometimes the comments on those streams get weird. His dad taught him to ban weird or inappropriate people from his streams which he does but that makes me nervous. When he was over his dad's house over Thanksgiving break he did a 24 HOUR LIVE STREAM! My ex said since it was break he thought it would be okay. I'm not a fan of gaming for him doing it for a "job" I'm also not a fan of.