A Youtuber with a million subscribers that can convert 1% of their audience to paid subscribers at $5 a month makes $540k a year on Streambus.
And they'd do it on their own domain name, with the full ability to leave at any time without losing their subscriptions or audience.
They don't need to leave Youtube, or turn off their existing monetization models either.
Meanwhile, their audience can use an app they already have on their phone, and don't have to watch ads from a middleman.