I used to watch a youtuber that played really hard rimworld scenarios for like me and his other 60 subscribers. When he started to grow up, to like 300 subscribers, he started to diversify his let's plays and some people on the comments started to complain that he was wasting his time trying other games or mods of rimworld, instead of playing the same ultra hard scenarios again. I was like ny dudes, if he want to do a living of this he can't marry with just one game, we don't know if the next game is going to be a banger or if rimworld is going to die. I eventually stopped watching him because he stopped playing those really hard vanilla rimworld scenarios, but nowadays he's a full time streamer and in the twitch salaries leak it showed that he got 60k at year by twitch. Not a lot of money, but enough for him to call it a full time job.