They literally don't. Data is their moat; selling it would be counter to their financial success.
Well not in bulk to its advertisement competitors as you seem to suggest. But as a different revenue stream, data collectors sell the collected information. Don't be naive, of course they do, first customer are governments.
Well not in bulk to its advertisement competitors as you seem to suggest. But as a different revenue stream, data collectors sell the collected information. Don't be naive, of course they do, first customer are governments.