Do we know how much money she's making? Maybe she's being smart about it and investing a lot of it so she can retire early, when she stops looking attractive?
It's a new world and new ways of making money, so all the power to her, really. I don't really know anything about her though, so for all I know her content is hateful. I'm not commenting on the content but rather the business model.
Her content is not hateful; at least, not anytime I've watched her in between streams from streamers I enjoy more. Her brand is having opinions, no different than a talk show host, really, except it's just her and then fielding questions from her audience. A lot of dating and life advice. AFAIK, she doesn't have any lewd content like most others do. (Lewd /=/ nudity here. Most of the Twitch girls do cosplay and lingerie. Few go full explicit.)
I expected much worse than outdated bootstrap theory in the OP's video. It's dumb, and privileged, but rather milquetoast. Openly admitting that she googles names of donors is saying the quiet part out loud; every content creator I've personally known has done the same, they just don't publicize it.
Money-wise, there are a few avenues for earning. Twitch has subscriber tiers now, and the streamer gets half the value of the sub. When subs were just $5, streamers would get $2.50 of that. Now, there are tiers that are like $20/mo. I'm not sure how much the streamer gets from those; maybe still 50%? These streamers also receive "bits" through chat, as well as actual outright donations. Of the few I watch (most are ASMRtists), they tend to get a couple dozen small donations (<$10) per stream. Bigger donations are rarer but still ordinary. One streamer I watch got a $2500 donation last month from a viewer. Many have weekly or daily sub goals, too, so that's one way to inefficiently ballpark income.
It's very good money if you can establish a returning audience.