Also you seem to be operating under the assumption that your personal data is something that can be used as payment. The GDPR literally does not allow that just as human rights don't allow committing yourself to indentured servitude. You can't sign away your rights. If you share personal data you continue to have rights to that data and can revoke your consent. It doesn't stop being your data just because you handed it over, even if you did so willingly.

If your business model can't work without exploiting your users' personal data, your business model no longer works and it's your job to find a new business model that does. There are plenty of business models that only worked when indentured servitude was legal (let's not have the debate about prison labor in the US) and I'm sure you would agree that it's fine for those business models to no longer work. It's part of the risk of doing business. Innovate. Disrupt. Or perish.