Class actions need to be made. Not just against AI, but Facebook, Google, Microsoft, banks... Basically anyone who collects data for profit while slipping it in as a secondary transaction in the terms and conditions, without providing any consideration.
The data brokerage industry is a $400bn industry, yet there are only 8bn people in the world. Even if we assume everyone is online and everyone's data is of equal value (both are far from true), that means an individual's data is worth at least $50 per year on the market. These are just people buying and selling data, and does not include companies that keep proprietary datasets and only sell advertising, or the value of peoples' written works online (which is likely of even greater value). Businesses are now selling off our copyrighted work for far less than its worth, all the while not paying the creator their rightful dues.
It simply isn't the case that data is traded for access to the website or service. That isn't how the transaction is presented. Front and centre, the services are offered free of charge (or sometimes, eg with Microsoft, you already pay for the service) and then a second transaction is buried in the fine print in obscure language. The entire purpose of this is deception, so the user does not understand the value they are giving up, and so as to deny them a fair opportunity to assess any supposed value exchange - because it isn't an exchange, you're giving it up for free, just like they give you access for free. It's two separate transactions deceptively run parallel.
You can't build a car without paying for the nuts and bolts. They steal the nuts and bolts we produce and then sell them on as their own products.
Edit: weird formatting issues from posting with low signal.