Developers have to be paid. When people paid for software with dollars, this exchange was much more straightforward.
There are plenty of services I pay for that sell data about me and/or show me advertizements.
So this is an appealing story, but it only works until someone decides "I could get paid, AND sell the user to advertizes/data harvesters." It's always easy to make now-impossible scenarios into appealing hypotheticals, and I'm sure that market forces COULD mean that none of the software or services currently supported through advertizement and data harvesting invasive and advertizement wouldn't do so, but nobody can say for sure.
There are plenty of services I pay for that sell data about me and/or show me advertizements.
So this is an appealing story, but it only works until someone decides "I could get paid, AND sell the user to advertizes/data harvesters." It's always easy to make now-impossible scenarios into appealing hypotheticals, and I'm sure that market forces COULD mean that none of the software or services currently supported through advertizement and data harvesting invasive and advertizement wouldn't do so, but nobody can say for sure.