You're going to need to expand more, because you're ultimately still implying some sort of new right to control your personal data compared to how things are.
"Market activity" occurs at the level of abstraction above the foundation of what ownership is defined as. Define ownership wrong, and it turns into just another sleight of hand where you've theoretically got rights, but in practice it's impractical to extract yourself and assert them in a meaningful sense.
Defining rights properly is what my comment was focused on. After that is done, you can build whatever system you like for companies to encourage users to allow the use of their personal data.
