My youngest is friends with a few of the SMP's as they (my youngest) are quite a successful Minecraft / Sims Twitch creator now ( they hit 80k followers the other day and made Twitch Partner a few months ago) - It was Minecraft that got them into the whole streaming thing so I'll always have a soft spot for that game. They make a decent amount of money from it (considering they are only 16), but to be honest that's secondary to the amount it's improved their confidence, social skills and mental health.
One of those positive stories about streaming/content creation that you don't often hear about.
**EDIT** Apologies for going a bit off topic