Hell let’s make selling anything about me illegal: my voice, my image, my ideas, my bodily fluids, especially my time and effort. Then I can finally live off the allowance our caring government will generously offer.
They can have my data but they have to pay minimum wage for it.
This is not a slippery slope toward outlawing anything you could possibly sell.
But it surely was an awesome cause for politicians who took this non-issue and made a huge deal out of it. Actual damage done: my browsing UX destroyed and great free services I used every day now under jeopardy.
Congratulations on taking your personal choice and preference and imposing it on the great majority.
They'd never go anywhere near the idea so I don't feel too much pressure to nail down how it would work for non-real-time data.