The amount of work that can be done funded by foundations and free work is nowhere close to what people want.
"If the product is free then you are the product" is supposed to be a cautionary observation, not an axiomatic proscription.
Does anyone actually trust companies that offer paid services to not harvest their data? Whenever I see this trope I think to myself that whatever lack of regulation, oversight and enforcement lead to that being okay would equally allow for them to both take my money and harvest all my of data anyways.
This is akin to people who criticise socialised medicine or services and pejoratively characterize supporters as just wanting "free stuff", as if the concept of collective payment is naive or something