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.