The same way most 'career' creators make their money these days, channel memberships, merch, superchats, sponsors, patreons etc. YouTube has already made it pr

The same way most 'career' creators make their money these days, channel memberships, merch, superchats, sponsors, patreons etc. YouTube has already made it pretty risky for creators to stake their livelihood on advertisement money, as YouTube can decide to demonetize videos and channels pretty much arbitrarily with no quick recourse (which is important given how front-loaded video view rate is) if a recourse is available at all, and companies can steal a large chunk of advertising revenue even for content that should fall under fair use. On top of that, YouTube can also put ads on videos even if creators haven't set them up, in which case the money does not go to the creators. As such it hasn't been worth it for creators to rely solely on advertising revenue or YouTube premium revenue for a while. YouTube, through its total disregard for creators, has long since made it not a stable source of income in the way that the others can be.