The cash flow is:
you -> merchant -> manufacturer -> advertising department -> google -> influencer
So if ads go away, theres two scenarios:
A: the influencer was worth your money and you pay him directly
B: he's not worth your money
I know, I'm making quite a few assumptions about how the market will correct, so I will also point that many Twitch-Streamer and YouTube channels already are financed through crowdfunding. It's not unrealistic that people will pay for good content.
If they provide something of value to their audience, they can take money from their audience, in exchange for that value. If they do not provide value for their audience, them ceasing to exist is not a loss for society.
