I've been following a streamer for a long time. He has 50-200 viewers and he says he lives from it. How well can you make a living from it?
That doesn't depend on the number of viewers, but on the number of subs and what other sponsorships he has.
There are people who have become millionaires through Twitch or similar…
If every viewer gives him an average of 10-20 euro, then he can make a living from it
Living with 50-200 viewers is hard unless the 200 people are all subs and donating, which is also difficult. He may also have YouTube or other platform sources of income.